insert disk 4 when installing from DVD???

The other day i was installing solidworks 2007 sp 2.2. i wasupgrading from 0.0. when it was almost done, i got a message sayingto insert disk 4. the only problem with inserting disk 4 is....iwas installing from the DVD. so i took out the dvd input disk 4 andnothing happened. then i cancelled the install. i restarted the SPinstall. same thing happened. this time i just cancelled. irestarted my computer and attempted to install the service packagain. didn't work. so i cancelled and SHUTDOWN my computer. afteri turned it back on, i restarted the SP install and this worked.
so if anyone else has this issue, this is a easy work around. thishas nothing to do with the installation problem with the .cab file.but a new one that i could not find any solutions to. my VAR had noidea what was going on and sent me the fix for the .cab problem.apparently they can't read what i told them.
my huge problem with solidworks now is that they would let aservice pack stay out there with LOTS of problems in the install.if 50% or more have problems with the install of a service pack,it's not worth having that service pack out. and they should haveleft the SP2.0 on the page so we had SOMETHING to work with. i hadto waste 2 days installing solidworks onto 3 computers because ofall the issues we ran into. but....they already have our money sowho cares about the software RUNNING.SolidworksAdministration