First i'll hope you will forgive my low english skill !
Then, i'm working on vidéo making-stuff, sorry if it's wrong forum part.
(an exemple is available Here on dailymotion).
During my research (thx google <3) i found your awesome website, and after trying some tools i must figure that i can't do it on my own.
What i call "spell sprites sheets" is for exemple the storm of the templar or the wraith missile (wraith launcher animation + rocket + impact animation) extract into a format that i can use for video making (like skin sprites sheets into .bmp)
So let's try to explain, for make this little gif movie, i have use tools for extract mpq sprites sheets into bmp and then after use lot of software (gif converter, gif maker, vegas tools, etc etc).
Like you can see, hydra do the shoot move but no acid is firing, like the marine bullet don't impact hydra (there is no bullet

Sorry if it's hard for you to understand but for me it's really hard to explain in english :p
So what i'm looking for, is extract the game "spell" effect into a format that i can convert for video making (like bmp) because record a game and extract the spell really give a bad result.
If you have more question or can't understand something, you can answer in this post, send a mp or add me at Myujinsan@hotmail.com
Thx anyway myu.