Ant Missions:
The sheet of morse code means the following...
When the game loads, hold shift & left-click on the speaker located at the top right hand corner.
Queen Ant:
On the last Ant mission (very hard to get to!), save your game and then load
up a "build - a - base" mission. Sell a couple of buildings and you
will hear "New Construction Options". You will be able to build a queen
ant.
Tesla Tanks in Skirmish:
When you enter Red Alert, click on the New Missions bar. Then, click on the
mission The Legacy Of Tesla. Build all the required buildings until you can
build the Tesla Tank. Then abort the mission. Now click on Multi-player Games.
Select Skirmish Mode. After you start a game, you should be able to build Tesla
Tanks.