unzipping files- nothing in game slot

i guess im an idiot, i cant unzip the ackerd for 1.41 or the r4igold update to put on my micro sdwhen i put the games on the disk and put it in the dsi ,, it says nothing inserted in game slotrunning windows 7

Install winrar http://www.rarlab.com/download.htmMost arcives come in that format - yes it wall also unpack winzip files

i can unzip now, but the dsi says , no game in slot???? where do you get games,,, i have a r4i gold
ver 1.4