Ok, still have problems getting this to work. I now have a complete download of 9.2 final release from a UK mirror, I just have to work out how to use it. I tried following the instructions on xcdroast's website on how to burn DVD, but it will only let me burn up to 1GB which isnt much help. I tried making the ISO image and then copying it to windows for burning, but FAT32 won't allow a single file bigger than 2GB the ISO is 2.6GB. :(
So I'm now using the software which came with the drive (Sonic MyDVD). This doesn't support bootable DVDs, no problem I thought I'll just use a boot floppy. Actaully big problem, the boot floppy won't recognise the burnt DVD as a Mandrake install CD.
I'm not giving up yet, it will work eventually.

But any tips/suggestions much appreciated.