Update 8 to 9.1 via HTTP

Hi folks, He have a 2 way here without a DVD that we need to update to 9.1 as part of an eval for procurement. As a hack, I set up an webserver on the 4 way (9.1) to host the DVD as it's root. So, I told Yast that this was the installation source and disabled the other 2 CD's as installation sources (SUSE/UnitedLinux). So, then I did a system update. It was able to do a few packages and then failed on about 700 packages. Yast provided no clue why, but I'm sure it's a dependency issue. So my question is, how can I update this 8.0 box to 9.1 using a DVD in another systems drive? Thanks for any help. Phil