i am trying to install need for speed underground 2 that i downloaded , i get through the first installation but then it tells me to insert 2nd disk…what do i do, i have both disks downloaded, is there a program to run the “disk” that i have downloaded…same thing goes with heros of might and magic 5
try this program " Alcohol 120% " . it makes virtual drives .
Don’t mess with the free trial of Alcohol 120%. Either get yourself a full copy (a lot less annoying) or use a free program called Daemon Tools that does the same things. 
I have a link in my sig. B)