Need help creating network of 1 Airport Extreme & 2 Airport Expresses!

Please somebody help me! I've literally been trying to get our home network to function for months now. I'm seriously about to cry if i can't make it work.
Here's the situation:
Our apartment is long and narrow and probably has lead paint, so our wifi, powered by a brand new Airport Extreme Base Station 802.11n router (named Igor) connected to a comcast modem doesn't reach the whole house. So we got 2 Airport Expresses to place throughout the apartment (named Sven and Svetlana) to help boost the signal.
First i tried to set up Igor to 'Create a wireless network" with the option 'allow this network to be extended' and the connection sharing set to 'Share a public IP' and i set up Sven and Svetlana to 'extend a wireless network' and the connection sharing was set to 'share a public IP'. Everything else was automatic or default pretty much. I got it to work but the connection was really weak and dropped out a lot.
Then i tried setting up a WDS network. no luck there either. so i went to the apple store and they told me i had to hard wire them all together using ethernet cables (roaming network i guess) to compensate for the ****** network acoustics in our place.
So...i ran 1 ethernet cable from Igor down the hall to Svetlana and another from Igor further down the hall to Sven. I set up all 3 to 'create a wireless network' and gave them all the same network name and password. i left the 'allow this network to be extended' option unchecked on all 3 and put them all in bridge mode and automatic settings for the radio mode and channel selection. After about 50 restarts i finally got it to work. Things seemed great for a minute until i realized that my laptop was the only one in the house that could connect to the internet. When i tried to troubleshoot the problem using network diagnostics and restarts, i eventually got my roommate's laptop to work but then mine stopped working.
i've tried changing Igor's connection setting to share a public IP address and leaving Sven and Svetlana's in bridge mode. I've tried changing the 'configure IPv4' setting from 'using DHCP' to 'manual' and entering in identical info for all 3 in the TCP/IP section.
no matter what i do i still have no idea how to make this work for multiple devices in our apartment. I really don't understand that much about networking but i am great at following directions. Please please please please help me! I'm desperate.
thank you in advance for your help!
ilana

So...i ran 1 ethernet cable from Igor down the hall to Svetlana and another from Igor further down the hall to Sven. I set up all 3 to 'create a wireless network' and gave them all the same network name and password. i left the 'allow this network to be extended' option unchecked on all 3 and put them all in bridge mode and automatic settings for the radio mode and channel selection.
In a "roaming" network, the router connected to the Internet modem should NOT be in bridge mode. In this case that would be your 802.11n AirPort Extreme Base Station (AEBSn). That is because you want it to provide both NAT & DHCP services to both AirPort Express Base Stations and the network clients.

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evelK wrote:
Just got a new 1TB Time Capsule. I want it to be the main base station for my network. I already have a network set up with an older Airport Extreme base station and an Airport Express to extend it. I am thinking that rather than setting up the Time Capsule to "join" the old network, the best approach is to disconnect the Airport Extreme and Airport Express and reset them. Then set up the Time Capsule as a brand new network and bring the reset Aiport Extreme and Express onto the new network as if my original network never existed.
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Maybe I was not clear enough on my post and configurations,
I had a Linksys before I purchased the airport extreme. My airport express joined the Linksys network for the purpose of airtunes. This worked flawlessly from day one.
Airport Extreme asked in the utility to take over an existing network or replace a router. If you chose this option it adopts all passwords, wpa/2 configurations for security and such.
I chose this option thinking that since it is an apple product it would take over everything and work. My airport express had origianlly been set to join my old Linksys network. Since the airport extreme took over this configuration it should work.
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My Linksys was never part of a bridge or a network within a network. It was removed before the Extreme was ever turned on.
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So heres the situation: I have 1 airport extreme in the house and another in the office separate from the house. The cable modem connects to the aiport express in the house through ehternet. An ethernet chord goes from the Aiport Extreme from in the house to the office in the back yard.
Decided to update my airport extremes with the new tall ones. Bought the normal one for the house and got the Airport Extreme Time capsule for the office.
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Leave it off at least 30 minutes. longer will not hurt at all.
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Oh and I have 8 total computers: 4 pcs, 1 Powerbook G4, 2 Imac Intels, 1 Macmini intel.
3 Pcs are hard wired the other wireless and all the Macs are wireless.
There is a dlink systeme set up that was implace before and used for wireless but with the new Macs im switching to Airports. Should I git rid of the Dlink wireless router?
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You will need to replace the D-Link with the Airport Extreme.
Step 1
Configure the Airport Extreme so it is working as a single wireless router - do not touch the WDS tab in other words where it was before you started.
For ease use a new network name and security.
If necessary do a reset.
Wait ten minutes
Step 2
Factory reset the Airport Express.
Plug the Airport Express in.
On your Mac remain connected to the Airport Extreme wireless network.
Run the Airport Assistant say that you want to configure a new base station.
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Once it has configured both Airports.
Wait ten minutes.
Repeat Step 2 for each of the remaining Airport Express units.
You may want to reconfigure the middle Airport Express as a relay unit instead of a remote unit.
You are good to go.
iFelix

Need help creating network of 1 Airport Extreme & 2 Airport Expresses!

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