1) Does HLDJ launch the game correctly for you?
Yep. You don't get any extra splash screens or anything do you?
2) Does "HLDJ Loaded Successfully" appear in console on starting the game (with no errors)?
Nope. None of the HLDJ commands (la, HLDJ and so forth) don't do anything either.
5) Does voice normally work for you?
Yes.