hey dude,
ive done a few ps2s in the past. I didnt use a fibreglass pen i used a stanley knife and a small screwdriver to scratch it off. Works Perfectly!
I got a v10 and a matrix infinity. Bo selecta!
N Dude if you feel confident go for it. Modchips these days are usially around 18 wires depending what chip you go for.
Gd luck man