Originally Posted by captainstormy
You could try something like gparted to remove the windows partitions and realize your Linux one to take the whole drive.
This was really my point... You could boot a live CD/USB, use Gparted to format the windows partition, then use gparted to expand your Linux partition to take that whole drive..
Lets say for the sake of argument, the hard drive is 80-120gigs, and the current Windows partition, is probably around 40-60gigs... It would take a LONG time to resize and reallocate 40-60gigs(I'm thinking several hours). If you have your data backed up, Boot the Install cd/usb, and you can do a "complete" install (where it takes over the whole drive) in about 15min.