I try not to partially furl the genoa. The boat performs better with a reef or two in the main instead.
My genoa tracks don't run forward enough for a partially furled genoa either. I've experimented with using a "barber hauler" made up of snatch blocks on a short line attached to padeyes on deck. (like the small picture below). This way I can use the same genoa sheets and still pull the sheet down and inside a bit when the genoa is partially furled.
There is a pretty good general discussion on genoa sheet leads at the UKHalsey website with a few diagrams
http://www.ukhalsey.com/LearningCent...clopedia5b.asp
I'll reproduce it here in case the link fails
UK-Halsey's Encyclopedia of Sails
-- Genoa Trim
Chapter 1
Chapter 2
Chapter 3
Chapter 4
Chapter 5
Main Sail Trim
Genoa Trim
Sailing to Telltails
Chapter 6
Chapter 7
Chapter 8
Chapter 9
Chapter 10