To remove the bulb:
Remove the headlight assembly. There are two 10mm screws on top of the assembly. Unscrew these, and the whole headlight/turn signal assembly will come out. The bulb is just held into the capsule with a plastic retaining ring.
When reinstalling the headlight assembly, make sure you get both tabs on the headlight bracket back in their slots. If you only get one tab in, the headlight will shake like crazy.