@formerslacker,
Slacker what you're asking is quite a major undertaking and that's probably why you're getting so little response; though Punk and Mac's comments are entirely valid. Incidentally it also helps to do a carriage return between paras
Especially endeavor to expunge iteration. For instance in just the very first sentence, "at _______ College" is redundant since it's
they whom you're addressing
I am ______, a Psychology Major, herewith requesting reinstatement for the fall semester of 2013.
Mostly the rest is 'way too wordy. For one thing they don't need to know why you selected that particular college; while you then list your shortcomings in far too much detail. You can profitably curtail the entire exercise
Meantime though if you can break your presentation into separate q's, presenting one at a time, each say on a subsequent day, you might get a few more postings in response
Good luck