Anyone know how to get the "Theta Wave Scrambler" to Cronus? I send a ship there on the mission, but when it gets there, it just goes to the nearby space station and doesn't do anything. What am I missing?

That's what it's supposed to do, but you should get a video showing you that it was dropped into Cronus, then a message from the Empiants telling you that the war is over.

Anyone else have problems with sound? Sound does not work well no matter what sound card option I choose. It "skips"

same here, aswell as having stuttering videos and low FPS and graphic-artifacts.

Delaying Biota threat
 

Correction to my previous post - The biota will not activate until you have 30 life support buildings on Rhea or Gaea, or until 1500 turns have passed, whichever comes first. This means you can have up to 29 life support buildings on the planets and can build as many other buildings as you like planetside, until turn 1500. This way you can accumulate lots of resources by the time turn 1500 comes around, helping you to deal with the biota threat when it happens. Also, I don't bother upgrading factories, as the more advanced factories really use up ore much faster, and each planet only has a limited amount of ore.

Make that a limit of 15 residential buildings on Gaea and Rhea total. Once you build your 16th residential building, the life forms on those two planets will start to become aggressive, slowly at first, and then more and more violent. Residential buildings on space stations or Calypso do not count towards this figure.

Sound
 

Use a front end like D front and increase the emulation speed cpu wise, that should clear up sound issues.