But i will explain you here, is not hard smile

Ok you will need 2x Cd-key's

After you install first game, change the name of the folder where you installed d2 from: Diablo II to Whatever you want, it can be Dia 1 or whatever briggrin
Now go again in the install kits and install Second diablo 2 folder

Note: Don't Change the names of folders until you got update from Blizzard on Battle.Net!! must be at the current version.

After you have 2x Diablo 2 games installed just do them shortcuts on desktop, name them Diablo 1 and Diablo 2 or whatever names you want to be easier for you

After that go and search for Sandboxie and download it into your Pc

Sandboxie runs your programs in an isolated space which prevents them from making permanent changes to other programs and data in your computer.

After you installed Sandboxie, be sure you ran it to:

Start Diablo 1 shortcut.
And on Diablo 2 shortcut you just do click right on it and click on "Run Sandboxed"

And that's all briggrin

It should work

Regard's