Only the .bin (image file) is that large.
Do you have a .cue or .nrg sheet ??
You will need it to load the cuesheet or nrgsheet (depending if you use nero or CdrWin etc.) into your cdwprog. and thats it, the prog will start burning your .bin (or whatever image file) to your cd and donīt worry it will fit on 80 min cds
