started new topic here becasue no one answered
Is it possible to get the original diablo last patched version v1.09 (available here on GOG) working with belzebub. I notice you can save with this version but I like the HD improvement provided here.

Yes.

Can you tell me how?

I have Belzebub installed and it launches from the desktop shortcut and I have played it some but not much.

I don't remember if there were any "hoops" to jump through when I first installed Belzebub so I suppose all there was to it was download the mod, copy the files to GOG's Diablo directory and if it hadn't already create a shortcut and put it on the desktop.

I have tried both above methods and unfortunately it doesnt seem to work. Belzebub patches up and the game works but the option to save during game is lost. I dont know if theres anything else I could try?

Belzebub does not support directly saving the game -- it works like Diablo II and constantly saves your character but not the state of the game world. That's a "feature" of the mod.

Basic HD support is there, but not ready for release yet since there are still some UI issues:
https://github.com/diasurgical/devilutionX/pull/361#issuecomment-541973714