Here is a weird one. I have installed your mod and when I kill Valygar, I don't get his body. (and since I am too evil to have him join me, I cannot enter the sphere). I started the game a couple of times with the mod installed and uninstalled and this seems to be the rule.
The other mods I have installed are:
Fix pack 1.12, Ascension, redemption, tactics, Improved battles, Kesley, Imoen romance, Tashia, Valen, Solaufein , Tweak mod, Silverstar, Item upgrade, Revised hell trials, Improved Oasis II, Flirt pack ,bonus merchants and banter pack but as long as virtue is not installed, the problem does not appear.
Do you have any clues to what the problem might be?