Thanks guys for getting back to me.
Right now I'm still trying to get it to work with Borderlands GotY.
I'm trying this method, but for some reason it's not working:
Using Steam launch options to install retail games from disc
Log in to Steam and click on Library.
Right-click on the game, select Delete local content, and confirm.
Insert the first disc into your computer.
Close Steam (Steam > Exit).
Press Windows Key + R to open Run
In the Run window type:
"C:\Program Files\Steam\Steam.exe" -install E:
Replace E: with the CD/DVD drive you are installing from if is not correct.
Replace C:\Program Files\Steam if your Steam installation is not in the default location.
Press OK. Steam will launch and ask you to sign in if you do not have your password saved. Your installation should continue from the disc.
VAC, I used the disc to install it a few years ago, but now I wanna reinstall it using the disc I just can't get it to work.
Korwin, "hit the download in Steam", do you mean the install button in the Steam app...which I've tried and it wants to download over the internet and not from the disc in the D drive, or are you talking about something else?
Robb, should I upload BLs off the disc onto my hard drive and then somehow move the entire file into Steam?