Is there any way that I can extract the utc file for the player character? If I can, can I alter it and put it in the Override folder, or will that cause problems? If I can't, is there a way that I can change the sound set for the pc with Player_Male_W/Player_Male_B/Player_Female_W/Player_Female_B lines in soundset.2da?
This can fairly easily be changed with KSE (
http://www.starwarsknights.com/tools.php) (savegame editor), it should allow you to modify the soundset of the player character among other things.
If you want to do it the hard way you can open the SAV (savegame) files with an ERF editor to extract the content, modify the data with a GFF editor (k-gff for example) and then put them back into the SAV file(s) again. This shouldn't be necessary in most cases through since KSE can handle editing most of the player data.