can anyone tell me in English how to get it to work

I suggest you use DOSBox and the D-Fend front end if you want to run older pc games.

and that will make old games run at a normal speed?

It will if you turn the cycles down (so yes)

so how do I get it to run in full screen?

You start it with the flag --fullscreen.

Start - Run - dosbox --fullscreen.

I’m still confused, the only way I’ve gound out how to play games with it is to run the icon for the game over the icon for dosbox and I theres no way I’ve found to put it into fullscreen.

and whats this flag you speak of?

It’s the –fullscreen written behind dosbox. Edit your DOSBox shortcut to read “path to dosbox.exe/dosbox.exe” – fullscreen.