I lost my extra hard drive which housed Premiere Pro 1.5 which was an "upgrade" package from Premiere 4.5. When I reinstalled the PP 1.5 on a newly installed drive it acts as though it cannot find some codecs or at least it doesn't recognize compression of files I previously created with it. Are all parts of a package included with the upgrade or does it use some of the original package? Since the original P4.5 never resided on the new disk I'm wondering if that is the problem. If so do I need to install the original P4.5 then reinstall the PP1.5 over the top? Help. I know this is an old package but it serves my purposes if I can just get it to work again!