You said "SCHP001", which tells me nothing. I'd need the actual model number, serial, and datecode to tell you the version.
You're missing a couple numbers in the middle.
Like a 30, or a 35.
My system, for example, is:
SCPH35001 = V4 Gran Turismo 3 Bundle Edition
But most numbers cover multiple versions, etc.
The best modchip for any version, in my mind, is the Apple. The Messiah2 is a better chip, but it's a LOT more money (double the price) and nobody has yet found a game the Apple won't boot.
- Gurm