Then, you are going to have to create multiple images for every machine that has different hardware. If you were going to use Windows 2000, you can use SYSPREP, and only use 1 image for every machine. Now, the world of imaging or ghosting, which ever you want to call it, is a whole new can of worms. If the machines are of like (similar) hardware, the PnP manager in Windows 98 can handle your needs. But, if you are planning to (or hoping to) use only on Windows 98 and Windows NT 4 image, you will run into problems.
Now, with Windows NT, remember that you cannot install this on different hardware platforms. The OS does not have the same kernel extensions in the Excutive area of the NT kernel, like that of Windows 2000. What I'm trying to say is, for every machine you plan to install Windows NT 4 on, you better make sure that the hardware is exact. Otherwise, you will run into problems. But, remember also, you cannot use SYSPREP on a Windows NT 4 machine, only Windows 2000.
If you have any problems with this, I have created numerous images, and developed numerous systems for the automated installation/roll-out of new machines.