[quote=Fraktal]is this guide always working ?
I tried to edit two mods, I can see them in the editor menu, but get an error message after choosing one of them "could not load xxxx"

thx [/quote]

It kind of works - when extracting the mod you also need to place the folders you extracted in their appropriate locations, being "Mods" and "Public" in the DOS2/DATA/ folder. It's fairly intuitive, just take a look at what exactly you extracted. You still need to do the above steps of making a folder in Projects and creating the meta.lsx file. As for the UUID, it wouldn't work when I created a completely new one, it also worked when I just pasted the big string of letters and numbers (e.g., ccb5167c-6c69-4132-8aa9-1ab6618af35b) there.