Psychic:
1) Darklotus issue - Go to your D3 Beta folder. Open up Data_D3 folder. Open MPQs, and Copy the Core.MPQ file over to the Assets folder in Darklotus's build. This will cause it to work.
2) For Alexxel's build, the spawn button has changed. Instead of right clicking to spawn, try hotkey #3 (that's what worked for me anyway). Also, it looked like it was just for the Barbarian's skills, and it doesn't look like you can kill the mobs.