maybe this will put you on the right track:
you have to make a bootable usb stick from the iso file:
http://www.webupd8.org/2010/10/creat...usb-drive.html
this works from Linux
within Windows you might use something like this:
http://www.isotousb.com/
and then make sure in the bios it boots from usb instead of disk
then follow the usual install procedure, just make sure that
you remove and reformat the Linux partition if you want to remove it.
if you want to make a dual boot system it might be better to
re-install windows and not use all the disk space,
then afterwards install Linux again.
This makes sure that Windows is in the first partition of the first disk.
Because windows usually needs that.
Then afterwards you can choose if you want that to you can install
Linux in the remaining space on the disk and when you boot Linux
again update and alter the boot manager depending on what flavor it might
have already recognized the partition or you would have to do that manual
by tweaking grub.
Then when booting again you can choose either to run windows or Linux.
don't be alarmed when you boot and don't see windows, it is still there
boot just needs the bootmanager to point to it.
Kind regards
Sietze van de Burgt