Quote: "These are really old some 15 years and although not impossible would require a lot of effort.
The texture formats are different etc. Never worth the time involved."
Ouch, sorry Synchro, but I have to strongly disagree with you here.
The old fpsc assets hold up extremely well and all they need are a few shader maps and maybe higher res textures to shine again.
In fact, all of my game projects us a lot of these old assets.
Here is an overview, former fpsc users can spot props from that era in virtually all of these projects.
Quote: "The texture formats are different etc."
No, the texture formats are usually .dds, the mesh formats are .x. They are barely different than max or classic. In fact a good chunk of classics DLC library are simply fpsc MP props (unfortunately, left as is and not updated which would have spared us many complaints back in the day)
All you need to do is make sure a proper shader is assigned and you can use the old FPSC assets. If you have a bit of time to spare and the necessary skill you can upgrade them to the PBR rendering pipeline for best results.
Quote: "For example German WW2 infantry are equipped with uzis (!)"
Its set in the .fpe file. Here you can choose the weapon you want them to have and what shader you want to assign.
Importing from FPSC to GG should be done manually, do not use the importer. You can always make a thread here if you have questions.