Help Backup/copy

Hello all try to make this short as possible

Ok well im buying neverwinter nights and warhammer 40k dawn of war on monday (That wasnt really need to know info lol) But…
Im just wondering if i was able to make back ups of these and if they could be played online (The copies) (had an unfortunate loss to my scratched warcraft 3 disc so now i want to be prepared)

I havent really burnt any games just dvds and such so im just wondering how this would be done and the program the only game i have burnt previously was Tribes 2 with Nero Express using the copy cd button anyway

MANY THANKS