Couple questions ....

[5LiterMustang]

Guys I've got a couple questions. I've been experiencing a few problems with some software...1 battlefield 1942...I installed it on my machine and the other machine on my network with the same disc. The compied the contents of each disc to a folder and then burned the contents to another disc since it wouldn't directly copy. Now whenever I use one of the new disc's it says please insert the correct cd whenever that cd is a copy of the other one...any ideas??? Also on Halo I am also having problems with. I start a LAN game on either machine but then I can not join it says "Invalid CD Key"...anyone got any clues?