Sure, first figure out which IFF is the power hammer. It would be in object/weapon/melee/2h_sword
then grab whichever saber IFF of your choice from:
save it as the file name for the power hammer, which I do not recall off the top of my head but it shouldn't be too hard to find.
I used to mod back in the day, but im having some issues moding the EMU (I put it off to I havnt made one in FOREVER). I found and extracted the power hammer IFF but I cant find light sabers in that file (or at all for that matter) I had hoped to turn it into the 2 handed OR, oh well I supose I will mess with it more when I get home but any advice (preferably semi detaild) would be apreciated.
General lightsabers are in /object/weapon/melee/sword/.
Crafted ones are in /object/weapon/melee/2h_sword/crafted_saber/ (as Lev said) and /object/weapon/melee/sword/crafted_saber/.
Grab those and handle them like you would any other.
If you don't know the .tre they're from, they're mostly from patch_04.tre, crafted ones are from patch_09.tre (for the most part).
There is also NGE swords, but you'll be able to find those if you had the NGE directory and opened the .toc file.