You really can do that. It'd be a really crappy programming job if someone hardcoded those options in rather than read them out of the database - and if you need proof that it does that, go in and change the name of one of the races and see if it isn't updated in the pick-list when you start a new campaign.
Since the database has 9 records for race and only 8 are currently selectable, and because there is no flag in the database that determines if the race is human playable, there must exist a simple hardcoded cap in the display/selection routine.
If you manually change your race to 9, things play fine, so the entire race cap exists at the race selection screen.
That, my friend, very much can be changed.
Like thier advantage over others would be harder to get KO`ed or Killed!
[Edited by Gatotsu, 1/28/2010 3:25:15 PM]