Mark,
http://timestamp.comodoca.com/rfc3161 is already a pre-defined timestamp server in SetupBuilder 10.
The following pragmas are working fine when using the above timestamp. The resulting file is perfectly SHA-2 signed and COMODO SHA-256 timestamped.
#pragma CODESIGN_SHA = "2"
#pragma CODESIGN_TSTYPE = "1"
I can post screenshots if you want.
Friedrich