gaming without the disk....?

[sg1kd]

ok heres the deal, i am confined to a bed and would like to be able to play my games without having to switch the disks. some of my games dont need the disk and some do. why? also is there any reason why i couldnt have all my games installed. i think i read somewhere that you shouldnt have alot of games becuase of file conflicts, true or not? i do own all my games.