Exsact bone names doesnt work, the problem the space after the Bip01 bone. The best you can do is use partial and just include the the Bone's full anme without the Bip01 at the start.
Oh, frustrating.
Thank you though, I think I've decided on a (obnoxious) work around by using a hex editor to rename the bone parts to something that won't cause problems with other bones being removed.
And thank you also for TOCP! It's actually your work that's inspired me to try and get a true working spider daedra playable race made. TOCP is definitely among one of my favorite mods.