actually you can still install 10g on 2008.5, but you will have to use the silent installer, that way it skips the GUI completely.
run ./runInstaller -silent -ignoreSysPrereqs -responseFile < patch to response file > unfortunately response files are not trivial to build, but there are examples available, I think the oracle bundle provides some in the installer response dir. Enda This message posted from opensolaris.org
