Part 1: Setting up the VEH files

Step 1:

Make a folder (on your desktop) with the name of the car you want to create an update for.

Example: 'Bentley League Updates'

Step 2:

Collect all of your custom skin files inside 'Bentley League Updates' folder
- ```
<team-name>_region.JSON
```
- ```
<team-name>.dds
```
- ```
<team-name>WINDOWIN.dds
```

For this guide let's assume our car is called 'Studio397'
- ```
Studio397_region.JSON
```
- ```
Studio397.dds
```
- ```
Studio397WINDOWIN.dds
```

Step 3:

Open MAS2.exe → \Steam\steamapps\common\rFactor 2\Support\Tools
Double click on the MAS2.exe

Step 4:

Open the 'car-upgrade.mas' for the car you want to update (example Bentley)
Navigate to \Steam\steamapps\common\rFactor 2\Installed\Vehicles\Bentley_Continental_GT3_2017
Click and drag the file 'car-upgrade.mas' into the main window of the MAS tool
Select and highlight one of the VEH files and right click
Select 'extract' and save to 'Bentley League Updates' folder.

Step 5:

Rename the VEH <team-name>.veh
Using our example this would be Studio397.veh
This should be the same name as the corresponding DDS files

So now we have these files

Studio397.veh 
Studio397_region.JSON
Studio397.dds
Studio397WINDOWIN.dds

Step 6:

Open <team-name>.veh (Studio397.veh) in a text editor
change the following lines in the text

DefaultLivery="<team-name>.dds"
MaterialOverride="BentleyGT3_BaseMat.json"

Example:

DefaultLivery="Studio397.dds"
MaterialOverride="BentleyGT3_BaseMat.json"

IMPORTANT: Do NOT edit the line MaterialOverride!

Next edit the car details for your car:

Number=<my car number>
Team="<my team name>"
PitGroup="Group1"
Driver="<unique driver name>"
Description="Bentley Continental GT3 #<my car number>"
Engine="Bentley 4L V8"
Manufacturer="Bentley"
Classes="GT3, GT3_Bentley_Continental"

FullTeamName="Bentley"
TeamHeadquarters=""

Category="Bentley, Bentley Continental GT3"

Example:

Number=397
Team="Studio 397"
PitGroup="Group1"
Driver="Jefferson Bartholomew"
Description="Bentley Continental GT3 #397"
Engine="Bentley 4L V8"
Manufacturer="Bentley"
Classes="GT3, GT3_Bentley_Continental"

FullTeamName="Bentley"
TeamHeadquarters=""

Category="Bentley, Bentley Continental GT3"

Save and exit

Step 7

Repeat the above for all custom teams and make sure each team has it's own uniquely named VEH file.

Part 2: Packing the MAS file

Step 1:

Open MAS2.exe again
Navigate to the folder 'Bentley League Updates'
Select all the contents of 'Bentley League Updates'
Drag the files into the main window of the MAS tool
IMAGE

Step 2:

In the save MAS dialog create a new folder inside 'Bentley League Updates' called "Bentley MAS files"
IMAGE
Select all contents in the MAS tool window and click on the 'create mas' icon in the top bar
Save the MAS as Myleague.mas

Part 3: Packing the 'update rfcmp'

Step 1:

Click on the filing cabinet icon and check where the working directory is set to. This will be where the rfcmp file will save to at the end of this guide.
The default location will always be \Steam\steamapps\common\rFactor 2\Packages

Step 2:

Note which odd version of the Bentley you have installed (in this example v2.47)
Inside the folder 'Bentley League Updates' right click and select NEW -> Text Document
Rename the file Myleague_v2.47.rfcmp - windows will ask you if you really want to, click YES ;)

Step 3:

Open MAS again (if it's not already open)
- If MAS is still open click on the white page above to clear the window
Click on the box icon at the top 'Create the package file'
IMAGE
In the dialog click on 'Create Single rfcmp package' button.
IMAGE

Step 4: Select Component

In the first pop up window start with the top Selection 'Add New Component' by clicking on the paper icon
IMAGE
This next step is very important!
Navigate to \Steam\steamapps\common\rFactor 2\Installed\Vehicles
Find the folder for the car you want to update
IMAGE
In this case Bentley_Continental_GT3_2017
Select and copy the folder name
Paste 'Bentley_Continental_GT3_2017' into 'Edit New Component Name' and click save
IMAGE

Step 5: Component

Next to the File drop down click on the file cabinet icon
IMAGE
In the browse pop up navigate to "....Bentley League Updates\Bentley MAS files"
Click on the file Myleague_v2.47.rfcmp and rename Myleague_v2.48.rfcmp and click OPEN
In the left field 'Version' put in v2.48
IMAGE
Check the box 'Update From'
IMAGE
In the right text field "Update from:" enter v2.46 (notice this is the base even numbered version)
IMAGE
In the 'type' dropdown select Vehicle
In the bottom window click on the box icon
In the browse pop up navigate to "....Bentley League Updates\Bentley MAS files" and select Myleague.mas
Last step click the Package button at the bottom and then Install
Note you do not have to click 'Install', but we highly recommend you install the rfcmp to check it works in Single player before distributing to your league.
The rfcmp will be created into \Steam\steamapps\common\rFactor 2\Packages (or see Step 1)