So I went to install 2009 and everything went fine... almost.
It downloaded the Protein Library as the last cabinet, then it went to extract the cabinet and I got the error:
"Error: Access is denied. Choose to retry or to skip cabinet 'C:\DOCUME`~1\sfaust\LOCALS~1\Temp\\ProteinMaterialLibrary.cab'."
Since I had the beta installed I figured maybe this was a permissions error, so I went to look for the cab file specified but it didn't seem to exist...
I started Revit and let it download again overnight last night thinking it may be a problem with the first download, but it still did the same thing.
Anyone else had this problem? I had Beta3 installed, and never had an issue with any of the beta builds libraries...