You can't update 10.0.0.0 to 10.0.2.2. 10.0.0.1 is the earliest version that can be updated. You have to uninstall the existing management packs, then install 10.0.2.2. Like others, I downloaded 10.0.0.0 from MS and it is listed in revision history as the first release, so there is no excuse for this problem.
I just did that and had to remove countless overrides and dependencies before I could remove the old version. Now I have to re-apply the overrides. Microsoft really needs to make clearing dependencies easier. The process hasn't changed since SCOM 2007.