There are some transcription programs out there you could try maybe, although I've never used them.
I have however, sat down and transcribed MANY two-hour-plus interviews in my time, and I don't envy you at all!
The parts where you have to wince at your own voice; all the um's, ah's and stutters, are particularly brutal.
I usually spend the entire tape just hating myself.
Looking forward to reading the results tho!!