If I press "Run 'make' and insert" in the editor a cmd opens and it writes the command does not exist. Is there a way to solve this or am I simply stupid?

Install devkitpro from the automatic installer on sourceforge (if your on windows). You only need to select the devkitarm part, I think you can uncheck everything else.

Thanks, now it works. There opens a cmd and there's a lot of text. But at the end it writes "[build]: error 2" and the hack doesn't work.

I am also encountering this error (on a winxp virtual machine - don't ask)

DekvitARM AND libnds.



That "lots of text" is compilation errors, and they tell you what's wrong so you can fix it.

If you post the errors here we'll be able to help you

Here it is:

Hope you can help me...

Oh, this thing. Blarg.

http://nsmbhd.net/post/33910/

Basically the ASM patch template broke with a change in recent DevkitARM.
Open the Makefile in a text editor, search for '-lgcc' and remove it (just that word, not the entire line). Save and try again, should work now.

I should update the template and make sure that "fix" does work well. IIRC I needed -lgcc for something back when I made the template.