do you mean texture a plain with an avi? i don't think you can, and even if you could it would be very memory intensive. a better (and more feasible) solution is to make several textures of each frame of the flowing water, and write a routine to change the texture of the plain to animate it. or better yet, just scroll the texture to make it look like it's flowing. i believe many commercial games use that technique.
oh, wow. insignificantpunks.cjb.net. we like orange treble clef notes, just for future reference.
no: website for progs yet.