This problem has happened to me (Windows 7, PC, in XP SP2 compatability mode)), on Dxun, after sorting out the palace and everything on Onderon. I did what you suggested (before reading it, so no blame to you), but unfortunately the Ebon Hawk galaxy map / navi comp seems to be locked down.
There is some dialogue option with HK-47 which mentions it, but that conversation gets me no-where.
Does anyone know any way of sending the Hawk and crew to another planet (eg. Dantooine) without the galaxy map? A console command or something? That would be extremely helpful...
EDIT: Ooops - Realised that that's a bit of a thread bump, but only by about 18 months so you don't mind I'm sure