There IS a way to make it work, but it requires alot of SOCcing, I've been wanting this flame trail too, for Nitemare of course, but I'm still trying to make it work correctly.
Anyways what I had planned to make it work was the character would spawn an object it would appear for 1-3 tics and disappear, during that time it spawns 2 of the same objects for 1-3 tics, one on each side of the middle object during the 1-3 tics it spawns a spinfire flame which I THINK is automatically hardcoded to disappear after some time.
So far I tried to make it work but I'm not an SOC expert.