This thread has grown a little old, but I didn't work much on the issue for some time for a number of reasons... it's time to report back.
After trying and getting frustrated with various backup software, I successfully cloned my root partition with Clonezilla. This broke grub, as I expected, which I partially got back after some fuss. The graphic issue was fixed by running XFdrake in command line mode. But after spending Friday evening and the entire Saturday doing these, there are still issues. Grub needs some work, as it can't properly see the Windows partition. Booting takes a long time, because it's searching for the old hardware in every boot. And who knows what else may came up, not to mention it needs a little extra customisation anyway since this is a laptop.
I also tried installing the remaster via the command line mode, but draklive-install returns an error:
Can't locate object method "new" via package "ugtk2" at /usr/sbin/draklive-install line 107
Out of curiosity I checked, and that's also the case with a PCLinuxOS 2012.2 live cd.
The moral: if you can't get your remaster to work because of hardware issues, don't bother cloning because it won't work anyway. Do a fresh install, copy your home folder, and manually install all the packages you need.