By all you mean saves and screenshots too? (not in same folder but on other harddisk) And another question (I am like virus
how to uninstall Iron Launcher.........your launcher is really from iron. I can play only SWC and Native (Native by reinstalling). And what is X.Y.Z. THX.
No, only the Mount&Blade folder into Program Files, press "Supr" and accept...
The Screenshots and savegames into My Documents is nice there...

Wait a moment, i'll explain you by a number indexed list:
[!] Follow this steps reading and understanding first...
1. Go to the Control Panel > Add remove programs > Select Mount&blade > Uninstall > Follow the uninstaller instructions...
2. When the uninstaller finished go to C:\Program Files\ (Or where you have installed the game) Find "Mount&blade" Folder, select it, press "Supr" and accept...
3. The entire M&B folder should be removed...
4. Install M&B.. in "C:\Program Files\Mount&blade". this is called a clean installation
5. Open the following folder in the Windows explorer: "C:\Program Files\Mount&blade\Modules\"
5. Download the latest version of Star Wars Conquest, you will obtain a zip file, open it and you'll see a folder, select that folder and drag and drop it to the to the Modules window previously opened.
6. If you have extracted the folder correctly you can enter in the following location: "C:\Program Files\Mount&blade\Modules\Star Wars Conquest 0.9.0\" and see a lot of files...
7. Dont use Iron Launcher... it does not run with steam...
Run the game as normal, select SWC module and play... you can always change the font with my script...
Hope it works, sorry if I'm mistaken in some things, but I never used Steam... you can auto-complete that steps easily