Hey, I'm going to tell you how to use your R4. :)
1.) Download the Newest R4 Kernel.
2.) Download your NDS Rom. (.nds file)
3.) Put your MicroSD card into your T-Flash USB (Or a USB that came with the R4, doesn't necessarily have to be a T-Flash.)
4.) Put the T-Flash into your computer.
5.) Wait for a menu to come up, and click 'Open Folder To View Files' or something alike, and if that menu doesn't come up, goto My Computer > *New Drive* (New Drive will be the one that you haven't noticed, or just double-click them all until you find the R4 Drive.)
6.) Drag then place the Kernel files into the Drive.
7.) Once that is there, make a new folder in that Drive named 'Games'.
8.) Now drag the .nds file into the Games file.
9.) Now safely remove the USB (t-flash or whatever) and put the MicroSD into your actual R4, and put the R4 in your DS.
10.) Start up your DS, and click on the smiley. (If it's still the same, just don't click multimedia or second-cart boot.)
11.) See if your game is there, and if it is, congrats.
Anymore questions, just ask RNC.