ok, a PC should work ok without any motherboard drivers, they just speed things up (enabling any custom abilities in the chipset). It's something you can worry about later, and of course your current Windows install will by trying to load the drivers from the old PB board ;-)
The following instructions are written from Win98 'Second Edition' so may not be exactly the same for a first edition ...
With Win98 you need both the disk and the serial number, it's also a good idea to have a copy of DirectX as most modern graphics drivers require it - you can get it from
here.
You start by setting the Bios to boot from the CD (rather than disk, Windows 95 was the last one that /needs/ to boot from floppy). When you boot from the CD you should get a startup menu saying 'Boot from CD' or 'Boot from Hard Drive'. Once you choose boot from CD you get another menu asking to start Win98 setup, start with CD support, or start without CD support - choose the middle one.
in the startup text it should mention which letter is assigned to the CDRom (probably 'E'), make a mental note of that. Type:
[size=medium]
E: //or whatever CDRom letter
cd\win98
format C: /q // the q is to skip verifying BTW
[/size]this will clear the 850Mb drive. After this you just type 'setup' and press enter, and the rest is in a GUI with instructions. (had you chosen to go straight to setup it would pick up the old install, and a full Win98 disk won't install over an existing install!).
Once Windows is done (200+Mb and about 45 mins later) you can install DirectX, try the video drivers again, install internet settings etc etc. Your second drive should show up fine without making any changes :-) IIRC I don't think SmartSuite needs re-installing, just the Shortcuts re-making.