Tilt in the direction you want to go. Blow yourself up by detonating your feet. The bits of you will all fly roughly in the direction you were leaning. Reassemble yourself. Repeat.
You will make steady progress (hence, it is a propulsion system). BIT of a problem for sneak attacks though...
I guess what you mean by Thermal Detonator propulsion is that you harvest the energy that would be produced during an explosion, and use that to power your droid?
EDIT: And actually no, you would be headed for the BHG.
God, nobody cares. Look, start and stopping the same faction multiple times contributing nothing but 2 or 3 R&Ds, no good stories, and 2 minialistic boring roleplays with more errors then interesting ideas impresses no one and does considerable damage to anyones trust or faith in you as a writer or roleplayer. And in terms of you idea, I'd say TRF's need for more droids is somewhere between the demand for a story about what happened to Jar Jar after AOTC and the demand for a return of Inuyusha Sanyo. Shelve your plans, join a group, write some stories, know your role, and stop being such a fucking clueless newbie damnit. You've been here for months and haven't figured it out yet. PAY ATTENTION.
Look man. All this angst against you is because you are on the Free-Bee TRF. You need to become a TRF Gold Member to have your respectability go up and your R&D's acknowledged as something other than tinker-toys.
Just send $59.95 to our Paypal Account for a 3 month's subscription to TRF Gold!