Can't connect to wireless network that works fine for other machines

I received my MacBook Pro last week (2.16 GHz) and I've been very happy with it so far. However, when I brought it home, I've had nothing but issues trying to connect to my wireless network. It's a Netgear, and you can read more about it at the following link:
http://www.netgear.com/products/details/WGT624.php
It works great with my Windows XP Desktop (HP Pavilion 1250n) and PowerBook G4. It works with no password, 40-bit WEP and 128-bit WEP. But not with the MacBook Pro. However, my MacBook Pro has worked at my office and StarBucks, so it works sometimes. Is there something special I have to set on my router for it to work with the MacBook Pro?

I also had problems with wireless connectivity while trying to access a netgear WGR614 albeit a v2 base station.
The problem was that I could not see the network from my MBP. It just didn't appear. The network was open with zero security. However my dell laptop was able to connect fine.
I noticed in the MBP config that the wireless locale was set to USA. I however live in Ireland. I then changed the locale inside the netgear 'wireless settings -> region' to United States. Now everything works fine. My dell didn't seem to care either way. It just picked up the new 'USA - region' based wireless network.
The problem now is that I travel quite a lot and usually I won't have the luxury of being able to change the routers configuration.
Is this just a MBP and Netgear WGR614 issue?
If this happens in the future is there a way for me to change the AirPort wireless card locale?
MBP 15" Core 2 Duo Mac OS X (10.4.8)

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