Hi everyone and I'd like to thank everyone ahead of time for any input.  I'll put my question in a list form.  Any helpful info or links would be great.
1) How do I mod each individual race to be able to colonize a certain planet type?  I would like a few of the races to have to compete for the same planets to colonize.
2) How do I mod the tech tree to limit the technology?  I would like to get rid of a few line of the technology so in the end, everyone of the races will have no advantage over the others.
3) How can I change the trade screen for each of the races I create?  I want a different image to use when dealing in a trade.
4) How do I change the Minor races?  I'd like to change the race info on any minor race in the game or one that eventually shows up.
5) Is there a way to give each Race a certain number of planets already colonized? 
6) Is there a way to give each Race a certain level of technology already at it's disposal?
Thanks again for any help.  I'm developing a custom mod that I would like to play out and maybe develop it into a book.