To stream on Discord:
- Open Discord settings
- Go to Activity Status under the header "Activity Settings"
- Beneath "No game detected," you should see "Not seeing your game? Add it!" Click on "Add it!"
- From the drop-down, select "BBPSX"
- Click "Add Game"
DO NOT enable the overlay. The game will not function if the Discord overlay is active. (At least this was the case with version 1.00; I haven't tested with the current version, 1.03.1)
You should now be able to stream the game as you would any other.