Spell modding--flightspr?

[MaxWilson]

I'm trying to mod Ghost Grip to have a flightspr in order to be a little easier to track, visually. The manual and what little discussion of flightspr I've seen on the forums leads me to believe this should work:

-- Make Ghost Grip easier to track visually.
#selectspell "Ghost Grip"
#flightspr 339
#end

However, whether it's Ghost Grip or a spell like Flying Shards that normally has a flightspr, all this does is make the flightspr invisible. Doesn't seem to matter whether I choose 339 or something else. #flyspr 339 3 for weapons works fine, but #flightspr 339 and #flightspr 339 3 for spells both fail. Has anyone played with this? All the spells I've seen modded just use #flightspr -1 so that's no help.

-Max