[Shop-talk] 'tri-'screwdriver?

[Randall]

> like a phillips, but instead of a 
> four-pointed 'plus' sign, it's got three prongs, arrayed like 
> a mercedes symbol.

Not sure if it's the same thing or not, but MMC sells a "tri-wing" driver
that looks about right.
http://www.mcmaster.com/nav/enter.asp?pagenum=2759

This also sounds like it's worth a try :
http://www.ps2fliptop.net/how_to_make_your_own_gamebit_scr.htm

Randall