Essobie,
You are probably thinking of PPJoy.
It was updated somewhat recently to support 64-bit and newest Win systems, but still requires special steps to work.
And yes, it's still a bit buggy and difficult to set up. Not much changed except the new OS support. And, unfortunately, the developer has shelved the project, claiming he will no longer continue development on it. He said he would release the code if anyone wants to continue where he left off, but doesn't look like anyone has or will at this time.
You can see about it here: http://ppjoy.blogspot.com/

That is exactly what I was thinking of. And now I remember reading that previous blog post where he said you had to be in "test mode" to get it to work. Yeah.... I don't think I need to play some of these games/sims THAT bad. Thanks for the reminder!

Update.

IL-2 Sturmovik: Cliffs of Dover different that IL-2 "classic" support more than four controllers.

Sokol1

So, am I correct in saying that if I use 2 TM MFD's that would be 2 controllers? USB touchscreen monitor behind each MFD another 2 controllers? Not to mention that the Warthog HOTAS and pedals would be 2 more controllers as well. How do I know just how many controllers a game can handle? Is that a DirectX standard? My overall goal is to be playing DCS A10, Flacon BMS, and DCS Blackshark using 2 MFD's w/ touch screens, a 20 some inch touch screen monitor, and maybe the GP40 whiz controller for switches and such. I've seen it done on youtube so maybe there is hope for me. Any thoughts on setups would be appreciated. Maybe a thread re-direction is what I need.

Uncle

F-22 ADF/TAW supports only one controller.

EECH (patched to latest) supports multiple controllers.

unclemiller

To know how many controls you have attached, look at Windows Control Panel > Game controllers.
Ie. Logitech G-940 system put 3 divices there.

I think that Direct Imput (DirectX) limit is 16 controllers.

Probable your touchpads is not see as contoller in game device, but as keyboard, so no count.

Sokol1

I think a useful sub-list would be controllers that recognize Windows Preferred Joystick and those that do not. Because even a sim that only recognizes one joystick can still have axiis doubled-up (say for trim knobs + main axis) and reassigned or combined from multiple joysticks/HOTAS/pedals using PPJoy and GlovePIE. This is the primary limitation because if they do not recognize this setting, such as I see in Janes Longbow Anthology, Search & Rescue 4, and Eidos Joint Strike Fighter, you seem to be out of luck. Comanche Gold, Gunship!, EECH, and most newer sims recognize the Windows Preferred Joystick setting just fine, even if many only support one full DirectX device full of axiis. If anyone ever learns a way to mitigate this on the older sims that have this issue, please post a solution.