Just a simple plan - a few pages with the a couple of paragraphs to cover the following points:-
background to becoimg a commercial pilot(ie licensing etc)
why i wanted/needed the money
where i was going to study
what the course dates and breakdown costs were.
how I intended to support myself during my studies
how I intended to repay the loan
what savings/equity i had.
what the job prosprects were like on completion of training etc
Hope thats of some help. Nothing fancy, just a heading and a paragraph for each point. I enclosed the plan with the application form and hey presto...i got the cash! Oh and 8k is the maximum for the CDL, jut incase you didnt know