ok, open the gani and in default paramater put your image filename. then when you add a sprite, instead of putting the filename put PARAM2 in it. then make an npc that has this
setplayerprop #P2,scythe2.gif;
if you have more designs, they will replace the default image using that npc command like
setplayerprop #P2,scythe666.gif;
Thanks to TB3 for telling me how a few days/weeks ago
