help setting up scummvm

I'm wanting to set up Scummvm on my m3i zero. I have read the guide at http://scummvm.drunkencoders.com/#download
but am unsure if when I unzip the scummvm files if I only install those with .nds file names onto my microsd card or all of them eg: there are also.gba, .cpt, .tbc, .dat files?
Also can I put all these files in a folder or do I need to put them all on the root of the ds card?
Thanks for any advice.

* Copy the scummvm NDS files on your MicroSD card using your PC card reader
* Copy the games you want to play onto your MicroSD card in any location, one per folder
* Boot the DS with the MicroSD card and card reader inserted
* Run the relevent build for the game you want to play (see 'Which games are compatible with ScummVM DS' below.
* Click 'Add Game'. Select the folder where your game is stored. Click 'OK'. Click 'OK' in the settings dialog.
* Click 'Start'.
(i think you are meant to copy everything over but it can go anywhere on your micro sd)
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http://scummvm.drunkencoders.com/#whatis <i got the information from the link on the left <