does it really matter? I mean, can't u copy files even when you are connected in 'PC-Suite' mode?

Saying that, try connecting the USB cable to the N900 and Computer. Then PC suite should say that the phone is connected in an incompatible mode or something similar. It could be worthwhile trying to play around and get to the files. By the way, this is only with Windows Machines I believe.

On a side note, how did you manage to burn a hole?