Help with Modding!!

Hi,
I hope I'm not being completely dense here but I've gone through the [Editing Saves] thread to see if I can find something to help one of the character swaps I'm trying to do.

I have been (really unsuccessfully) trying to swap Kelder (from the Magistrates Orders quest) with Anders so that when Fenris does his magical fisting thing he does it to Anders instead.
I've got all the tools I need, I can swap Hawke or other party members around and change them into other NPC's but I cannot for the life of me find the bit in the GFF editor where I can change people like Kelder for a party member.

Hope that made sense and if anyone can help I would be hugely grateful!

Also apologies if I should have posted this elsewhere, I really wasn't sure where the best place was.