DSTWO and my own SD card.

I have a 3ds, So I ordered a dstwo and I opted to get my own micro sd card as I could get it stupid cheaper than any online shop would sell them for.So my question is will I have to load the dstwo eos on the sd card put it in a nds run it and wait for the update, then I just put my roms on the sd card insert in the 3ds and go play?
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anyone?

Read : http://eng.supercard.sc/manual/dstwo/use.htm

Thats what I figured.