[rhelv6-list] Proper way to add to RHEL6's GDM?

[vincent at cojot.name]

Hi everyone,

Speaking of desktop environments, what's the proper, clean, recommended 
way of adding a 3rd party desktop environment to RHEL6 without hacking 
into all of the /etc/gdm stuff? I cannot seem to find it in the 
documentation anywhere (gdm 2.30.x) and other people with similar needs 
seem to be hacking away under /etc/gdm.

Under RHEL4/5, it was just a matter of adding stuff under /etc/X11/* as in:
/etc/X11/dm/Sessions/OpenWindows.desktop
/etc/X11/gdm/Sessions/OpenWin

Any ideas/hints?

Thanks in advance,

Best regards,

Vincent