[Memfis]

I just got the new PS Two as a gift and i am wanting to mod it with a new chip because i have a couple of ps2 games that are scratched bad. I heard that there is problems with the new ps2 and mod chips though. I also have no soldering skills and was planning on having someone like sped mod it if i have it done but i noticed he is not doing it at the moment. Can anyone advise me on what to do? I was looking at the Crystal chip because it has many of the features i want.