You are best off following this dual boot movie eliminating the steps only required for dual boot.
There are a couple of small errors so if you follow this transcript which points them out you will be fine.
Forget the qtparted section.
Just remember your partition numbers will reduce by one and in the lilo section forget the windows part and reduce the timeout to something small like 20 which is 2 seconds just in case you need it for something later.
follow that and you shouldn't have a problem



