hi im really interested in buying this EZ-FLASH 3 in 1 expansion pack Rumble for my ds and gba. but it wasnt too clear on how it worked with r4 ds. i saw this http://www.gameyeeeah.com/r4-r4ds-ez-in-ex...lack-p-298.html but ive no idea how it works. has anyone else tried this combo? how do you get software onto it?