2 ACID : you're risking to damage your recorder - overburning IMHO is not for Dysan's CDs. and the "right" cd's aren't cheap, i suppose
solution :
simply buy the 800mb CD.. I've bought the last instance at the "Discland" shop (Barekamutyun). It was the last, and they didn't know whether they should have that kind of disks in the future
2 ALL : is there anybody brave, who can check that kind of trick ?