I made something very similar to that but less advanced and a lot bigger.

Thanks!

He told me, allow me to tell you in turn.

When you decide you want to upload a vehicle in-game, press the generate thumbnail button.
In the IODV folder (%USERPROFILE%\AppData\LocalLow\Radiangames\Instruments), an image named "ws_Thumb.png" will appear.
Replace that with an image under 1mb (best if square) before pressing the upload button.
Voila.

Please, how'd ya do it @jenkins
I gotta get the thumbnails workin

Hi. I featured your creation in a showcase video. Hope you like it!

https://www.youtube.com/watch?v=CUS-vzSdv8s

Another awesome magnet gun :D
And @CampyTY, I think I pointed you in the right direction after you commented here :)

How'd you get that thumbnail to show up? I tried but only added pictures.