how do I delete other animtion sets completly so I can export to .x properly

How do I delete other animation sets completly so I can export to .x properly?
I have a character for a game that needs to be exported to .x but the problem is it keeps defaulting to the other blank animation sets. I want to delete them so i just have one called generic with all the animation on it, and so the exporter can work properly and have no choice but to use the right animation set- I want to delete the other datablocks if that’s what they are called.

Sorry if that’s not clear, hope some one can help.

bah, searched again http://blenderartists.org/forum/showthread.php?t=60916&highlight=datablock
that seems to slove my problem. didn’t search well enought the first time