How to create custom shader?

[anonymous_user_e7f8f3c6]

@anonymous_user_e7f8f3c6

I use the Unreal Editor that came with Star Wars: Republic Commando. If I may, could someone please tell me how to export a shader and edit it to the point at which it would best befit these two images?
501stCommander.bmp and 501stCommanderHelmet.bmp are the names of the images. I cannot seem to post them here, so if at all possible. you can send me a private message requesting my email contact information.

Or, better yet, you can take a look at the flickr photos shared by yours truly, Coltrane Eightone.