You will find the number in the URL of each mod's page, for example :

http://steamcommunity.com/sharedfiles/filedetails/?id=530693136&searchtext=

The "Corner Lights" mod's number is then : 530693136

When you have this ID, go to your VeryGames panel, in the Configuration tab.

You simply have to place the mods IDs in the field, click on "add" and save the configuration.

Therefore, you'll have to create a Steam group. Invite all the players you wish to grant access to.

You'll then need the ID64 of your group.

• Go to your group's page
  

For example :

http://steamcommunity.com/groups/nameofthegroup/

• Add "memberslistxml/?xml=1" at the end of your group's URL : http://steamcommunity.com/groups/nameofthegroup/memberslistxml/?xml=1
  

Copy the group's ID64 that is located into the "groupID64" tags :

• Once you have you ID64, go to the "Configuration" Tab of your VeryGames panel and click on the configuration file :
  

All you have to do left is to place the ID64 into the "Group ID" field, and save your configuration file.

• Go to your Steam profile and copy your profile's URL
  
• Go to the website http://steamidconverter.com/ and paster your URL.
  

This website will convert your URL into various elements, including your SteamID64.

Once you have obtained your SteamID64, go to the "Configuration" tab of your VeryGames panel.

Select the configuration file, and add your SteamID64 in the "Administrators" field.

Save your configuration file.

Then, your server will be restarted.