I just found 2 versions of Phoenix Technologies BIOS Editor on my hard disk archives, which I guess are worth of archiving. I'll post them here, since thread's title says "old BIOS modding tools", without an specific brand, unlike the AMIBIOS tools thread.
*Phoenix.BIOSEditor.v2.0.18E was a "demo" version available at time on Phoenix own site. Is old and as far as I remember, it can't "recompile" the BIOS module files back into a ROM image from the GUI/IDE... But since the GUI actually can edit the modules themselves, which are stored in a temporal directory in a prepared form, along with the script to generate the ROM image and all the necessary tools to make it (PREPARE.exe and CATENATE.exe mainly), is actually possible to do the build "step", and generate a completely functional ROM image outside the IDE to overcome the "demo" limitation. This version can open some old core v.6.0 ROMs which can't be opened with the newer versions of the Editor.
*Phoenix.BIOSEditor.v.2.2.0.1 is a fully functional version of the application, which was available short time at Intel public FTP site... Along a sort of Phoenix BIOS OEM Adaptation Kit (with the actual object code bios functions library to generate newer ROM projects), which unfortunately was lost in the sands of time. Since is the full application, you can generate back the ROM image from the edited modules all on GUI... But unfortunately this version can't open or properly recompile some old rom images, which v2.0.18E has no problems with.
Them are too big to be posted in forum, so I uploaded the files to MEGA. I hope this can be useful to someone.