When installing GP10 on a Win 2003 server, I get a red 'x' next to Microsoft Dexterity Shared Components 10.0.
Then: Initialization failed. Review the log file for more details: C:\DOCUME~1\<USERNAME>\LOCALS~1\Temp\1\log849.tmp
I drilled down in the CD to the Bin\DexCmn folder and ran the Dex Common files setup separately, and I got:
.Net Framework 2.0 is not installed. The installation cannot continue
Then: The Dexterity Shared Components installation has ended prematurely. Click Finish to exit the installation
It won't surprise you to learn that it is installed, in fact the 3.0 and 3.5 framework are also installed.