Okay here is a short howto for doomgoo:
Create a file called "doomgoo" in /local/gmenu2x/sections/games containing this:
And yep, it points to dmenu, but you could install the doomgoo scripts everywhere you want. Maybe /local/gmenu2x/scripts. You could take the doomgoo scripts from my later pack and the wad files, too.
Or just create own files looking like this:
chmod +x prboom ; ./prboom -file fistful.wad
Hope that helps.
And I didnt included this, because I didnt get it to run when I created the pack.
For the people saying local packs suck, Ive already got more than 100 downloads of this pack. Lazy guys.