I got a mod that changes the crosshair/ reticile

http://www.tesnexus.com/downloads/file.php?id=4044

I want to use this mod but is there a way to change the crosshair when using a bow, and back to normal when I don't?

I was thinking that there might be some way to do it with a script, but since I don't know anything about scripts, I could be wrong.

you cannot switch back and forth(no mod)
as for finding someone that might like to make such a mod well......

That might be pretty tricky to pull off because you would need the script to detect if a bow is equipped. To my knowledge you can't check for categories (aka: bows/maces) so you would need a separate line for every bow, which would make it very incompatible with mods that add new bows.

Then would it be easier, or even possible, to use it as a cast-on-self?

And if I could, would it be able to switch back to normal on a timer (180 sec.) or would you have to cast a different one to set it to normal?