Woops, I forgot about this thread.
Alright, I'll just use an arbitrary VID/PID, unless there's one I can use to make Windows recognize it as a generic USB to serial? I can't find any information about that on the internet. The only thing I can come up with is to use the ID of one of FTDI's chips that get recognized as generic, but that seems poor form.
I guess in lieu of that, I can figure out how to make a .inf to get Windows to use the generic USB to serial driver. I think it's usbser.sys?
I really want it to "just work", all it is is a USB to serial converter, surely it can't be that hard?