Ps 2 controller Modding help.

OK. A couple of years ago I bought a Nakiworld Ultimate Fight Stick.

Personlly I think this is the best arcade stick I have ever played with.
I even went to the trouble of finding a Ps2 to usb converter that would work with wireless controllers for PS3 and PC (Big MAME and MUGEN player) The only problem is that the controller desyncs after about five minutes of play on both the PC and PS3. I plug it in normally to the PS2 and it works just fine.

I have an old PS2 controller extension. I was wondering if anyone could give me some helpful info on how to wire a wireless controller? I have never attempted to mod anything before and trying to get as much research done as possible while I prepare.

Here is a link to the controller. I have tried several times to contact the company (They are still in buisness) about getting a wired version of this arcade stick but I never get a response.

I would also love to get two more and fit into a huge Arcade cabinet that was being discarded that I got and am in the process of turning into a huge MAME cabinet.

http://www.naki-world.com/78006.html