Good call Steve. I was debating the best route down Geronimo on Sunday, having strayed too far left (I think) on a previous recce. I will be doing exactly as you advise on the day.
Re. Fell shoes (or not) - you definitely want something with big studs underneath coming down this one! I think Mudclaws will be a good idea for the last few climbs too, any extra grip will help!
Martyn