Reinstalling EQFollow

My HD crashed and burned but I have a backup I can restore from. Should I install all the expansion (Original up through GoD) and then restore on top of that to get all the patches, or should I just do the restore?

I've had a similar thing happen. Computer died a few months ago. I was able to salvage EverQuest from my old HD. So I reinstalled from the disks (upto PoP), copied over it with my saved EQ files (from 4 months ago), ran the patcher and updated everything.
Seemed to work fine, until I hit the "Play" button on the patcher. A message popped up that I was missing the d3d9.dll file and EverQuest was shutting down.
Anyone know how or where I can get the d3d9.dll file from or what disk/expansion it is from?
Am I going to have to start from scratch and do a completely free reinstall of EQ and spend 40+ hours patching all the current expansion from Kunark to GoD?

d3d9.dll is part of directx9, not part of EQ.

Reinstall Dx9 from Microsoft.

Thank you all for the info... I'll go and update Dx9 now :)