For distance racing a bag is very good. For around the bouyos, you should get/make a snuffer.

It sounds like your spi-pole is set up for a one-line setup, like the one illustrated on page 11 here: http://www.geocities.com/kustzeilen/Genaker/GenakerWord97.zip (Something Wouter wrote?)
You use a bungee to suck the halyard away from the tramp when hoisting. Running this bungee from the back beam to the forestay fitting trough a turning block and back will give enough elasticity in the system if you run the halyard 2:1 on the bungee. You might want to stitch a running block to your tramp to lead and organize the halyard while running back to the aft-beam.