if you want e.g. to import the xdad.spr spritesheet, run ./server.pl xdad.spr 192.168.THE.DS 192.168.THIS.PC and boot runme.nds then select your access point and click '192.168.xx.yy:808z:xdad.spr' with the stylus.
Sorry if this sounds newbie at all, but how would I go about running a .pl file? (Windows treats it as a text file.)