Back in my OS/2 days I wrote one. It only got to be about 60% done. Figuring out the container control was the toughest part and even then I still wasn't 100% on it. Most of the statements in CONFIG.SYS had a dialog box control in a tabbed window I think. Pretty slick. Anything it didn't recognize got relegated to an plain ol' edit box.

But it's days as a commercial desktop OS are long gone...

*sigh* It was great at the time to do some real multitasking on my 386SX-16/8MB (when 8MB was A LOT of memory) and later P90/16MB (that was still a lot of memory too.) Aside from some rough spots the interface was good at the time. I was really looking forward to OS/2-PPC... :-(