I recently rewrote AppleUSBMergeNub for PCI linked devices.
The injector can operate against any IOPCIDevice entered device and can function for lots of things.
For fixing your DVD drive (to get it recognized in System Profiler as Apple Shipping Drive) you need IORegistryExplorer.

Install Procedure:
-Look up your DVD drive in IORegistryExplorer.
-Next get under it the IOSCSIPeripheralDeviceNub.
-Look up Vendor Identification (default in DeviceMergeNub Info.plist is "HL-DT-ST") and insert it in the Info.plist.
-Look up Product Identification (default in DeviceMergeNub Info.plist is "DVD-ROM GDR8162B") and insert it in the Info.plist.
-Install the kext in /System/Library/Extensions.
-Reboot
-Enjoy the Apple Shipping Drive recognized DVD drive.

This should work for all PATA and non-AHCI SATA and AHCI drives.

Download including sources:
http://rapidshare.com/files/43291811...ceMergeNub.zip
The driver is under build/Release.

Download for Tiger, Leopard or Snow Leopard:
http://rapidshare.com/files/43349686...Nub_all_os.zip
Or below...
The driver is under build/Release (Tiger/Leopard).

Download for IORegistryExplorer (if you don't have it yet):
http://rapidshare.com/files/43068777...ryExplorer.zip

We serve to please...