Thank you for all the input. I finally received the game,and as far as I can tell, it's definately Alt Tab friendly. I have been playing for hours and all is well. I'll be back if anything is not compatible. Thanks for all the input. By the way... It's very lovely and excellent game.
Cathy

Edit 12 Oct 07.
I finished the game and had a wonderful time playing it. I think this one is a keeper. Can't wait for Tunguska 2. I Alt Tabbed all the way through with not a problem or glitch. I like to thank Mag for the wonderful walkthrough. I love my new computer.

Cathy
