wrt54g v3 as bridge (client mode)

I've read that a WRT54G could act as a bridge or access point with the right firmware and configuration. I'd like to bridge my WRT54G to my WRT54GP2. What'd be the least painful avenue to take?

I've also seen that some 3rd party firmwares offer this option (i.e. Alchemy, Freeman, HyperWRT) & I'd like to know which one would be the safest to use. Also, if the firmware doesn't work then how can I reset the router back to its original firmware (i.e. factory default). Thank you.

I don't know your reason for wanting to bridge, but since your only criteria is "least painful"...

http://www.linksys.com/servlet/Satel...VisitorWrapper

I've had some experience setting up the linksys access points (WAP54G, etc.) in bridge mode and it never seemed to work very well.

Never used third party firmware on linksys equipment, but you may want to check the fine print in the warranty before experimenting.

Here are my reasons:

On the 2nd floor, I have a Linksys WRT54GP2 for Vonage & it doubles as a wireless router. In the basement, I have 2 computers I'd like to connect that don't have wireless adapters. I've read that a WRT54G could be used as either a wireless bridge or access point which'll also function as a switch to accommodate multiple connections to the internet. If I use the right firmware then I should be able to make this work. Instead of buying multiple wireless adapters, it'd be less expensive and more beneficial to buy something that can behave as a bridge or wireless client.