TFT WE Attachment Art Problem

I'm having a bit of a problem using TFTWE. Using .slks and .txts, I could easily change the art for a spell like slow, to use the art from unholy frenzy, or some such. The problem is, there is no target art referenced in tftwe. If I put in one, it'll attach it, but it'll also attach the slow art. I can't seem to get rid of it. Furthermore, I noticed long ago there's 2 types of arts: looping and non-looping. Slow, rejuvanation, etc, all continue to loop the same animation for the duration of the effect. On the other hand, dispel magic simply runs one. If I try to change the target art to a "looping" type of art, it won't attach at all, and just run the slow art. And when I change the target art to a non-looping type, such as dispel, it runs the dispel & attaches the slow as well, which continues to show on the model. Any idea how to remedy this?

Additionally, can you import the old .txts using the import file, and will they work? I may try it as a last resort, though there's no way to reference the unit codes for a custom ability you've created that I know of.

I guess my last option is to do it all by .slk and .txt, but does this method even work anymore?

Thanks.

slks and txts still work. in fact, they work better than the WE.