^ without knowing much i am assuming it is not a true image backup using something like dd
but rather a copy of all the files and directories zipped up in a .tgz
if that is the case, i dont think any operating system would have a method of installing
it (unless there exists a custom script to copy stuff to the right location). else i think you could manually go thru the directories and copy them where you want them.
if you still have the old hardrive it mite be possible to do something like:
dd if=/dev/hda of=/dev/hdb # or of=suse.img.iso
is a gui that can copy partitions.