Clean Up

Hey,
I unfortunatly have to formate my harddrive (C: ) on which FSX is installed.
My question:
- what files do I have to back-up to have for example the logbook, rewards, etc. after a reinstall of FSX?
- And is it possible to have add-ons (aircrafts, scenery,...) on another HDD than the FSX folder is (maybe by linking the aircraft folder or the aircraft itselfto the SimObjects folder)?
I unfortunatly have to formate my harddrive (C: ) on which FSX is installed.
My question:
- what files do I have to back-up to have for example the logbook, rewards, etc. after a reinstall of FSX?
- And is it possible to have add-ons (aircrafts, scenery,...) on another HDD than the FSX folder is (maybe by linking the aircraft folder or the aircraft itselfto the SimObjects folder)?