printer instal

I have some computers using windows nt but are standalone computers. I was trying to instal imb 4019 and 4029 laser printers to the computers. I downloaded the drivers for these printers but when I try to install the drivers it does not recognize the printer. I tried just using a generic one from win nt but it ask for the nt cd and when I insert the cd it tells me that I don't have permission for the cd. Can anyone pin point a problem or a solution for this