Streamline Servers offers a wide-range of mod packs in which you can install at the click of a button for your Minecraft service.
Before changing your server type to Forge, Bukkit or any other type for that matter, it is recommended that you create a backup of the server files beforehand.
In order to change the server type of your service, follow the following steps:
1) Go to your servers control panel and stop the service
2) Once the service is stopped, click on the button that says "mod manager"
3) Once you've clicked on this manager, select the specific server type that you wish to run. For this tutorial, we'll run Forge. Proceed to then install this server type.
4) Once the mod is installed, head back to your control panel and press on "Commandline Manager"
5) Once you've pressed on this manager, you should see predefined commandlines
6) If your specific server type isn't automatically selected in this commandline, press on "Custom Commandlines" 
7) Once you've pressed on custom commandlines, proceed to press on "New"
8) Once creating the new commandline, select the box to the left of the JAR Selection column, and then proceed to select the dropdown within the JAR Selection column in order to select your server JAR file
9) From here, ensure you input a description and then press save. Once saved, ensure the commandline is selected
10) Once selected, head back to the main control panel and start the service. This is how you install a custom server type.
