Mysteries of the Sith Level Editing HELP!!!

[Jj117]

i was wondering if anyone can help me edit the levels of Dark Forces 2 and Mysteries of the Sith levels. I wanted to add Some Republic Soldiers here and there particularly in the first level and escort ship level of MoTS and some other ones in Dark Forces 2. Any help would be appreciated. I am a complete noob on editing and would be grateful if you CAN edit it or show me the tools to do it. Thank you so much.

[Effix]

I've never played it, but maybe there's something here: https://www.moddb.com/games/star-wars-jedi-knight-dark-forces-ii/downloads