One thing I don't understand is yesterday I asked you to put one game on dh0 to test and you have reported that it wasn't working which is weird because it should work.
In my Minimig for example, I have a 2GB HDD..see the pics below...everything is working fine, even when I use this HDF with UAE.
For what you want to do (when you quit a game to go back to tiny launcher), Olesio has done some scripts that you can found in this thread.
Personally, what I do: I use the RAD and I put TL at the begining of the startup-sequence. So...
1/ The startup-sequence starts TL
2/ In TL you select your game/demo
3/ The Amiga is reset
4/ It boot your selection from the RAD
5/ You reset the amiga.
6/ It boot back from the startup-sequence > TL
When you don't want to stop anymore you shutdown your amiga.
If you want to go to the Workbench under TL you press ESC.
There's a utility which works with the mouse, it's called 1touchmac, if you press a mouse button at start, it will boot a choosen startup-sequence.
I know that there's one for the joystick as well.
Well there are many possibilities