I have installed Mandrake 7.2 on my laptop. It may or may not be working correctly as of now. I downloaded Fedora ISO's 1, 2 & 3 but they will not install on boot up. Any suggestions? Should I reformat the HD first if I want to do fresh install?

Hello.

Deleting all the partitions on your harddisk is probably the best thing to do when you want to have a quick and clean install; you don't have to manually resize or assign partitions.

For your boot problem;

Have you checked your BIOS that CDROM will boot before your hda/IDE-0?
Does your laptop BIOS support booting from cd?
Did you install Mandrake 7.2 this way?

If so, then I think something could be wrong with your Fedora ISO's.
Also, it could also be possible that cd cdrom iso was not correct, maybe it was not defined as bootable. Where they official ISO's? from fedora.redhat.com?