This seemed to be the best place to put my skin related babblings. I believe the route to replacing textures was mentioned on another thread, but I'll post my version b/c I'm bored
The file path:
Go into C drive >> Program Files >> LucasArts >> Republic Commando >> System
A window with several tabs should pop up (if it doesn't there are some buttons at the top of the window -- click on the one that looks like a pretty picture and it'll take you where you want to go).
Click on the textures tab. There are two drop down menus. Click the top one.
Select "clone textures." Click the bottom drop down. Select "clone textures" from that
menu as well. This will bring up your commandos (Boss and some other unseen commandos are in there).
Backup the original files. Right click on a skin (for example, "texture clonecommando62") and select "export to file..." from the pop-up menu. Choose a destination and add .bmp to the file name (otherwise it won't show up).
How to skin:
Included in the texture package is a plain white commando skin. Export the skin (same as above), open up your favorite image editor (Adobe, GIMP, Paint Shop Pro, etc. -- I use Paint Shop Pro), and go to town.
Here's a handy dandy reference I made for telling which part was which: commando parts
Also use the original skins for reference... that's what I did
Importing the skin:
Click File >> Import
A window will open. Make sure the "package" and "group" both read "clone textures." In "name" type in the name of the texture you want to replace (if you want to replace Sev's skin type in CloneCommando07). "Compress as:" DXT5. Click OK, repeat as necessary, then save and play the game.
Some of my hard work
The double crest on the tops of the helmets was someone else's waaay cool idea (I forgot who, but I loved it so I used it for my guys), but the rest is me going "that's too light/dark... too much/little... OMG I have to be up in two hours... I hate that color..." you get the idea
Basically, I went with Ninja Turtle colors b/c I didn't like anything else...
my squad lead skin on Fixer's model
And just for fun
I'm going to shut up now