Question about R4

I just recently bought an R4, and was wondering if there was any way i could load a GBA emulator on the R4 so it can run both DS and GBA games.

You need an EZ-Flash Three-in-one. You can use that to run GBA games on your R4DS.

is that some sort of program that i can load onto the card, if so could you link the program.

No, it is a piece of hardware. And GBA Flashcart which plugs into the Slot 2, GBA slot, of the NDS. The R4 will load the GBA games onto the slot 2 device, and the NDS will play them just like a GBA game. It costs about 20-25 dollars US.