I am having a problem with dowloading anything from the many campaigns, airplanes, etc, available from Simviation.

I have a Pent IV processor, 256,MG of RAm, Direct 9 , and all the bells and whistles required to run these programs.  I do, however, have windows XP.

When I download a campaign it will go to  MY Documents as a zip file.  After opening the file I try to move it to the Game program and it will appear there  .  After all this it will not appear on the game .  I did get the Iwo Jima Campaign as far as CFS 2 but could not open it on the game.  It is there it just wont open.

I am practically computer illiterate and don't understand all I need to know about this stuff. 

I would appreciate all the help I can get I live in a very remote area and computer experts are non-existent.