Thanks for creating this tool. However, when I open up a RIM and try to extract something, the tool crashes if the file I'm extracting has no extension (ie, the "Type" field in your tool). I can list the RIM contents just fine, and extract anything with the "Type" field set, but nothing with that field unset.
It's actually Jade Empire (xbox version) that I'm trying to mod. Using your tool, I've been able to extract some 2da files, edit them with the 2da editor in kotortool, and make some minor tweaks (such as unlocking the Monk Zeng character in the regular version of the game, even though he's supposedly only available in the limited edition).
Can you confirm that your tool crashes when trying to extract a file with no extension?