I know of at least one source on this issue:
A DVD available from
www.fiberglass-repair.com. I think the DVD you would want is Learning Fiberglass Repair, Disc 2, Transom Repair. It goes step by step from beginning to end showing a from-the-inside-out repair project on a typical boat (not an aquasport, but close enough if one looks things over and adjusts the advice to what you actually see in your boat as compared to the one demonstrated.
I think the website included some still photos of the process on a step-by-step basis.
Otherwise, if you search this forum, you can see some very high quality pictures and jobs from the inside-out-posted here too.
RGB