Rename the D81/2 image THEC64-image.D64 and put it on the root of you USB stick,then put it into TheC64 Mini.
Open a game from the carousel.(Alleykat) Exit it Go to BASIC Type LOAD "*",8,1 command don't press the return key yet. Make the save state now by pressing the 3rd red button and pressing fire on Save/Load games then pick a slot there are only 4 to save to and each one will be a picture of the screen saved you,press the 1st red button to save it,So next time you start up the machine, just go to BASIC and the press the 3rd red button and load the save you made before(Don't press the wrong button,make sure it the 3rd to load the game not 1st button,it's easy to make.. ) and you won't need to go into the carousel game in order to get the fast-loader and d81/2 image support.
So how to load a D81/2 image...
Rename the D81/2 image THEC64-image.D64 and put it on the root of your USB stick. and plug it into TheC64 Mini USB port and the goto Basic and load your save now by pressing 4th button menu key and press fire on Save/Load game then highlight the save and press the 3rd button to load it and then press return and load D81/2 disk image then type RUN then Return then game will start.
Hope this help you get more games on your TheC64 Mini..