Hi,
I just downloaded the mojoportal-2-2-8-3-mssqlreleasefiles.zip from Codeplex and it unzipped and setup just fine for me. If there was a problemit may have been a temporary problem with the codeplex server. If there was really a problem with the file I think a lot of people would report it.
Make sure you have .NET 3.5 sp1 installed.
Hope it helps,
Joe