> How can I add new icons to Emperor:bfd? And how can I replace the old Icons with the new ones ill have put in the game?

I'm not sure how to put new ones in, you probably just save them as TGA format and place them in one of the subfolders within the Data folder.
But you change the icons by editing the artini.txt which you should be able to download from most E:BFD websites.
Just browse thru the document. It's self-explanatory.