I have several friends who've modded their PS2's... Some of them still work to this day... Other worked for several months then died... And a few got screwed off the bat...
It seems like a hit-and-miss type of mod... The initial ones had alot of wires to be soddered in (12 to be exact), but the newer versions got reduced to 7, i think...
The few who have had their PS2's modded used the 7 wire attachment
BUT they had the earlier version of the PS2 (Big and bulky - not the new slim line version)...
As usual you're taking a gamble on doing any sort of mod to your PS2... But then again, their cheaper now than they were a few years ago...
Whatever you do, good luck with it...
- Air B