I've been playing with the following practise dummy mod -
http://download.fliggerty.com/download--893
It seems the dummies don't always activate. Sometimes they appear hollow (ie cant hit them) and cause a CTD when I try to activate them. Then sometimes they work as intended.
I've tried the dummies on a new game, there seems to be a 50/50 chance that they will glitch, or be functional as practise dummies. (was testing the wolverine hall dummy using the replacer only plugin)
I wouldn't think it would be a conflict with another mod.