Try posting this question on the Carnetix forum, you'll probably get a better answer there.
Ive recently upgraded to a Intel Core Duo, I formerly had a G4 PPc. I was using Carnetix P1900 Version 2.0, can this be upgraded to the 2.2version with the resistor mod, like version 2.1?
Ive searched it but only come up with V2.1 being upgraded.
Just soldered a 6.8k resistor in on the off chance, and it works perfectly.