IMPORTANT: FIRST OF ALL MAKE A BACKUP OF THE "MISSION" FILE IN C:/Programfiles/LucasArts/StarWarsBattlefrontII/GameData/data/_lvl_pc (copy the file or re-name it to "mission2" AND ALWAYS MAKE BACKUP FILES WHEN YOU DO THIS STUFF)
First of all we shall have a Hex Editor. My favourite free one is PSPad. And it's free!!! If you want that, go to [url]www.pspad.com'>Link when you've done that we shall find the mission.lvl file. It is located in your C:/Program files/LucasArts/Star Wars Battlefront II/GameData/data/_lvl_pc folder.
Double click on it, and when Windows ask, which program to use, find the editor you have dowloaded. Be sure to set the blinking black cursor thing, on the right of the file (that with the text). Click now on the Find button or click Ctrl+F.
Search for kam.lvl. The first find you get is about the soldiers in the campaign mode on Kamino. That's not interesting. Click search again on search one time, not interesting, and again – here we are.
This is the Kamino conquest level. If you don't know that, you can always scroll down a little bit and, see ...kam1.lvl_conquest.
But you can see the name rep.lvl and cis.lvl. Try to change rep_hero_obiwan (it's ObiWan) to rep_hero_yoda, its not so difficult, just try to write over Obiwan. But now you see its wrote rep_hero_yodaan, and we don't want the two last “an”. Now mark the last “a” and find were it is in the left side (the hex side, the side with numbers). There should be a box around a sign, the sign of “a”. Remember! One sign on right side, is two sign inleft. Now overwrite on the left side, 61 with 00 and also the next character, 6e with 00. Now you can see on right side, that “an” had become “..”!Try to play Kamino conquest – but be sure to set up the hero options in Instant Action options to timer – always – always, so you get the hero from beginning!