Mod Chip Identification?

[stfuhello]

Hi guys ive looked through the forums and the sites for a guide which tells how to identify what modchip has been installed on which machines. . I dont think i will have any trouble identifying what version of ps2 im looking at thanks to this great guide http://server1.megagames.com/ps2/ps2...fication.shtml. The main problem is that i am not permited to take of the cover of the intended ps2 but do know that it is modded. Any ideas ? help im a n00b