You will have to open it entirely !!!
The modchip is soldered on the Mainboard, so when u can't see the meinboad, hopw can u see the modchip ???
I got a little tut for u
It's in german but the picture are more important than the text
the best german PS2-Forum
PS 2 Aqua V9 + Matrix Infinity + 200 GB HDD
PSone + Stealthchip+ PSone-Tasche
PS 3 60 GB PAL -->320 GB
Wii+Wiikey + 60 GB USB HDD
Nintendo DS Lite white + Cyclo DS Eolution + EZ-Flash V 3in1 Exp. Pack