Well, I tried to write up a thing on how to do it with that drop-in method so you don't have to write in your default .ini, but it didn't work, and I don't know why. Maybe someone else can help with that, but if you want to use him right now, you can open up your UTCustomChar.ini in My Documents\My Games\Unreal Tournament 3\UTGame\Config, and add these lines:
Parts=(Part=PART_Head,ObjectName="CH_Corrupt_Male.Mesh.SK_CH_Corrupt_Male_Head05",PartID="E",FamilyID="LIAM")
Characters=(CharName="NewCorrupt",CharID="N",bLocked="false",Faction="Liandri",PreviewImageMarkup="<Images:UI_Portrait.Character.UI_Portrait_Character_Liandri_Male_Head05>",CharData=(FamilyID="LIAM",HeadID="E",FacemaskID="A",TorsoID="A",ShoPadID="A",bHasLeftShoPad=True,bHasRightShoPad=True,ArmsID="A",ThighsID="A",BootsID="A"))
You can change his name to whatever you want.