How to package a RF2 skin for a skinpack

Make a skin how you normally would, after completing it follow these steps:

1. Create a folder somewhere (i.e. on your desktop) and name it something useful
2. Open the rf2 MAS2 editor. This can be done from the launcher or by going to Steam\steamapps\common\rFactor 2\Support\Tools and running MAS2.exe. (If you know what you're doing and have the loose skin files, place them in the folder from step 1 and skip to step 5 after opening the MAS tool).
3. In the MAS editor, you need to open the skin mas file you created in game. This will be located in Steam\steamapps\common\rFactor 2\UserData\player\Settings\<Your Car>\<Your Name>\. For me this was Steam\steamapps\common\rFactor 2\UserData\player\Settings\RADICAL_RXC_GT3_2017\RANEK\. Open the .mas file in that folder, either using the open dialog in the MAS editor or by drag and dropping the file into the editor.
4. Extract the files show in the editor, select all the files and right click > Extract, selecting the folder you made in step 1.
5. Rename all the files to your team/driver name and car number or something unique. The _region.dds should retain that at the end of the file name. For example mine are TempleOS#14.dds, TempleOS#14.json and TempleOS#14_region.dds.
6. Click the 'Open Mas or Loose files' button and navigation to Steam\steamapps\common\rFactor 2\Installed\Vehicles. Find your car in the list and navigate into the highest version number folder. For me this was Steam\steamapps\common\rFactor 2\Installed\Vehicles\Radical_RXC_GT3_2017\2.77\. Double click on the car-upgrade.mas file here to open it.
7. Sort the list that now shows in the editor by type and go to the VEH file section. Extract ONE of the VEH files to the Step 1 folder. I usually chose the VEH file that starts with the full car name, if there is one (in my case this was R_RXC-GT3_726860c2.veh).
8. Also extract the <car name>_upgrades.ini to your Step 1 folder. DO NOT MAKE ANY CHANGES TO THIS FILE!
9. Rename the VEH file to match the other files in your folder (mine was renamed to TempleOS#14). DO NOT RENAME THE UPGRADES.INI FILE!
10. Right click the VEH file and open it with your favourite text editor
11. IT'S IMPORTANT NOT TO MAKE ANY MISTAKES HERE! Change the Number to your number, Team to your team, Driver to your UNIQUE driver name and the description whatever you want as long as it ends with #<car number>. For the skinpack you'll need to edit the Category line as well. For OVGT3S7 replace the part before the comma with 'OVGT3S7', other series will use something else here. If you don't change this line your skin will be placed with the default skins. If you do it'll be added to the OVGT3S7 section of the car selection screen. Save the file.
12. Back in MAS editor, click Create New MAS file. Drag and drop the contents of the Step 1 folder into the MAS editor.
13. Click the Create the MAS file button and save the file out to your Step 1 folder with your skin/car name.
14. Zip the mas and send it to the skinpack email address. Please include what make/model car the skin is for.