I found out the problem. Instead of choosing the Data icon and Make Bootable Disc icon, I had to choose the Copy and Backup icon on the top, then choose the Burn Image to Disc icon. I then navigated to C:\DRIVERS\WIN\PCDRDOS\ then chose Files of type, Image Files (*nrg,*iso,*.cue). Click on the *.iso file in the window, then proceed with the burning. I hope this helps any other CD image burning n00b's like me.
PC Doctor for DOS bootable CD - ThinkPad




