I really think you should follow the guidelines - just to be on the safe side. After all, you don't want to destroy £100 worth of Playstation just to cut a few corners now, do you?
Hm, £100 is 1500 Swedish Crowns, I think.
I think I bought my PS2 Slim for that much, and no, I don't want to destroy it.
Oh yeah, I'll try and read the guidelines then, I want to play Star Ocean: The Second Story soon.