Ok, first of all, calm down.
Powerpoint and folders with tabs is a bit OTT, in my opinion. For my student visa application, I mailed:
my passport
birth certificate
letter of acceptance from the uni
2 months of bank statements
one paystub
letters of student loan approval
2 passport pictures
cashier's cheque for the fee
I mailed it certified mail through USPS with a signature return card. I had my visa back in about 2 weeks from the LA Consulate. If you have final acceptance from your uni and proof of finance/support, you have nothing to worry about. International students mean big bucks to the UK Uni system and they won't refuse you out of hand.