Code:
AddActor = AHuman
[tab]CopyOf = Skeleton
[tab]PresetName = Skeleton AK
[tab]AddInventory = HDFirearm
[tab][tab]CopyOf = AK-47
[tab]AddInventory = HDFirearm
[tab][tab]CopyOf = Pistol
[tab]AddInventory = TDExplosive
[tab][tab]CopyOf = Frag Grenade
[tab]AddInventory = TDExplosive
[tab][tab]CopyOf = Frag Grenade
Paste that at the bottom of of skeletons.ini in Base.rte, and replace the [tab]s with presses of the tab key. I might be wrong about the weapon names, if it gives you an error, say so.