Necessary to have the same wireless network name for using WDS?

Question

I have set up two Airports in WDS mode. I did this so my ps3 could get on the internet via ethernet (its an older model, and doesn't have wireless, so you have to use an ethernet bridge). I set up the WDS fine, and my Airport extreme base station (the square one) is the WDS main, while as my old Airport extreme (snow) is the remote, which I use to run a cable from to my ps3 to access the internet. This works fine when I have the network names for each base station the same.
I was under the impression that you could have two different named wireless networks for two base stations (i.e .they have different names), as long as you have the MAC addresses set up correctly for the WDS settings (i.e. main and remote). However, when I do that, I can no longer access the ethernet from the remote base station on my PS3. I can only access the ethernet via my PS3 if I have the wireless network for each base station literally named the same. Seems kind of strange if you have the MAC addresses set up correctly for the main and remote, as shouldn't they be talking to each other via that mode, and not the actual wireless network name?
I would like to have each base station with its own wirelss network name, so I can differentiate between them. I get some strange issues when my airport card scans, it frequently switches between base stations, and this slows down certain programs (i.e. VPN connections for mail etc).
I set this up pretty literally from the airport guide from the apple site.

Answer 1

I was under the impression that you could have two different named wireless networks for two base stations (i.e .they have different names), as long as you have the MAC addresses set up correctly for the WDS settings (i.e. main and remote).
No that is not correct. Since the 2 are working together to create a single wireless network, they must use the same network name.