Adolif today has just released a new version of this mod (0.9RC2), grab if at the official site.
- Graphically is almost fixed (no more reflections showing a player's screen, for example), both players have a HUD, and to crouch as Player 2 you just have to push the left stick.
- Cutscenes are now skipped and (THIS IS IMPORTANT) after they're skipped, Player 2 will teleport to where Player 1 is, so make sure you stick together. (Though if you get stuck, bring on the console and type "noclip 1" for Player 1 to be able to get through walls, then deactivate it with "noclip 0" and Player 2 can teleport where he is.
- In the level "Enpro Plant", if one player dies then both players respawn at the beginning of the level (the enemies you killed until then don't revive, though), so make sure you quicksave frequently.
- Player 2's screen still doesn't have sound.
- If a player dies, he may lose the more powerful weapons (from the Chaingun to the BFG 9000), so drop your weapons frequently so both players have the weapons.
