HELP PSX MainBoard

[seaneyb2003]

hey,

i was just looking at my psx or old playstation 7502 and i saw on top if the motherboard a metal case like thing which goes over the ic chips and so on so i cannot get to 2 of the solder points required how do i get this off do i have to desolder it? here is the mod diagram http://www.kanection.co.uk/pcb7502.htm hope this helps a bit.

Seaneyb