HP Legacy BIOS Modules Extraction

Hey everyone,
Using UEFITool and UEFIExtract I can extract every EFI module on my HP BIOS image, but I am interested in extracting the modules used in the Legacy boot option (like those that can be extracted with older Legacy BIOS files with tools like bios_extract or Phoenix BIOS Editor).

How can I do that?
Does the firmware filesystem holds a Legacy BIOS image file in one of its volumes?