Re: Product Credits, I do (just check my gallery)
I use the script (that comes with POSER: Menu>Scripts>Print Info>listfiles), to generate a listing of what I use in my renders. Copy the text, paste it in a Notepad doc, use that to credit the makers (if here) in the spaces provided and if the makers are not here they go in the main text description. I also when I unzip/rar files is to take the readme (if one) and place it in documentation folder in Poser, either by product name or in a vender folder for verification.

"Few are agreeable in conversation, because each thinks more of what he intends to say than that of what others are saying, and listens no more when he himself has a chance to speak." - Francois de la Rochefoucauld

Intel Core i7 920, 24GB RAM, GeForce GTX 1050 4GB video, 6TB HDD space
Poser 12: Inches (Poser(PC) user since 1 and the floppies/manual to prove it!)