Welcome to HLP Station, May your stay here be pleasant. Please be aware that our resident tame Shivan, Carl
, lurks in the air ducts, if you happen to see him, back away carefully, toss him your lunch and pray that he isn't hungry. In the event of an emergency, the plasma rifle is stored under your seat. However, due to budget cuts, the napalm has been replaced with holy water! Access to the weapons lockers is restricted to Admins/Moderators,
and The Hyper Intelligent Shade Of Blue
. Mention of a third instalment of our favourite game is prohibited as are any combination of the characters eff ess three. Should this station develop a serious fault, please board an escape pod which has been programmed to take you to our sister station Game Warden. Please try to avoid all flame wars that can flare up at any time in various parts of the station and once again enjoy your stay!
For your first problem, that looks like a registry problem, I'm not sure how you would go about changing that. Maybe check Kara's FAQ
Shade answered your second problem.
Your Third Problem has me stumped, however, within the launcher try using the 3d Orb radar and see if that helps.
As for your final problem, well I don't recall if the GTF Myrmidon is in the original FreeSpace so maybe you're not selecting the "Main FreeSpace" campaign within the campaign room?
Have you got a screen shot of your main FreeSpace2 folder so that we can check that everything is in the right place? and what is command line settings?