It shouldn't be a big problem. It's fairly simple to either exchange or add an additional optical drive.
Did it come with any manual and if it didn't you can
probably download a users manual at NEC's site.
Hope this helps some.
I have a Dell Dimension 3000 With XP
I have just purchased the new NEC 4511 DVD/CD BURNER and would like to know if it is a big job to install it in my computer?