anyone know how to set one of these up? the website guides are not very helpful =/

By card do you mean micro sd card? And its very simple. You just download
a file, usually zipped, on the official website, unzip it, then drag all the files into the ds.
Format the card before you put something on.

yea i've just gotta get a micro sd card...just testing it on someone elses micro sd card before i buy one.
i downloaded the file earlier but accidentally deleted it from my flashdrive so i gotta wait till i get to a comp i can dl something on =p