[newbie] 8.2 install problems

[Scott Wagner]

I tried to install 8.2 last night and ran into some problems.  When I got to the part where the packages install, no packages seemd to be available.  I got an error message like "depslist.ordered mismatch against hdlist files" and "Basesystem package not selected.".   After this failed I tried to go back and reinstall 8.0.  This time I got "Nothing found while parsing /mnt/var/lib/urpmi/hdlist"   I was then able to able install an old 7.2.  Feeling like I was on a roll, I tried 8.0 again. I got "Unable to open /mnt/something/something/RPM."  When I logged out I saw a message something about "Unable to open rpom database, if you recently upgraded...." couldn't catch the rest.   I get that 8.0 and 8.2 can't seem to get at the packages, but why and what to do about it?   Appreciate any help, Thanks, Scott