Recently purchased some. Windows however does not seem to recognise that they are what they are, it says that the disk capacity is 702mb and WMP still says, in burning mode only 80 mins free, anybody else had the same problem?

To burn to a full 90 minutes you're going to have to use overburning to access the last 100mb of the disk. I can't find a good link atm, but considering using something like Nero to do this.

hmm, cheers, i read about that somewhere.

Feurio does overburn and is free to use shareware no time limit. Needs some driver updating for IDE drives though.