You have to use the command to recall pictures. Unlike TI-83+ pictures, 68K ones can be any width/height. Just recall it anywhere you want on the screen using RclPic (I think the syntax is RclPic picVarName,row,column), AndPic, XorPic or RplcPic. You might want to check the V200 Guidebook on TI website for more info at
http://education.ti.com/en/us/guidebook/search/graphing-calculators but keep in mind there's no table of content (seriously, a 1000 pages-long manual with no table of content... what were they thinking?). Also, each picture is one separate variable in the memory menu, so with 800 sprites this means 800 pic vars being listed there.
This could also be handy for picture use.
http://tifreakware.net/tutorials/89/b/ge/Also, pics are slow-ish, so don't expect a grayscale Reuben Quest clone