Addon Managers For
Flight Simulator X
and Prepar3D

Addit! Pro For Prepar3D

How to Install a Sound Addon

This topic demonstrates how to add a sound addon to Prepar3D using Addit! Pro For Prepar3D by working step-by-step through the installation of an actual, downloadable sound addon. This walkthrough shows you how to install a sound to a folder of your choice, configure installation options, review reports, assign the sound to an aircraft and verify the results.


Our sound addon is called FSX T-45C Custom Sound Pack by Serge LSA. It requires the Boeing/BAE T-45C Goshawk aircraft by Dino Cattaneo. Install the T-45C Goshawk first.

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Step 1: Start Addit! Pro

Begin by opening Addit! Pro. Click the Install button:

Step 2: Open the Addon Installation Wizard

When the Addon Installation Wizard window appears, press Select Addon Files:

Step 3: Select Addon Files

When the Select Addon Files window appears, locate the file you downloaded above. Select only the file. Make sure all of the files inside the zip file are selected in the Zip File list, as shown below. Press OK:

Step 4: Addon Installation Wizard Revisited

Back on the Addon Installation Wizard window, all colored status indicators are either green or yellow so you could press Finish at this point and install the addon using the default configuration. Instead, we will tweak the configuration to demonstrate how you can customize the installation process. Press Configure Sound:

Step 5: Configuring the Sound

On the Configure Sound window look for the section "Install the sound files to". Pick "An existing or new sound folder" then press Next:

Step 6: Select an Installation Folder

On the Configure Sound window,press Change Folder:

Step 7: Create a new Sound Folder

We will store our sound in its own custom folder, one we will create. On the Select/Create Sound Folder window, enter "T-45 Goshawk Sounds" in the folder box near the bottom as shown below, then press ENTER. This directs Addit! Pro to store the sound files in this folder. Press Select to continue:

Back on the Configure Sound window, notice all the Target Folders of the sound items have changed to reflect the choice you made in the last step. Press OK.

Step 8: Addon Installation Wizard Revisited

Back on the Addon Installation Wizard window, we will skip past the Configure Other step. The step indicators are yellow, so the default values should work just fine. Press Installation Options:

Step 9: Setting Installation Options

On the Set Installation Options window, enter an addon name. The Quick Picks button provides a handy list of possible names. Optionally, identify the authors and provide a description as shown below. Press OK:

Step 10: Review the Installation Summary

Back on the Addon Installation Wizard window, press Installation Summary and review the choices:

Tip: maximize this window to see as much information as possible. Everything looks to be in order. Press OK:

Step 11: Install the Addon

On the Addon Installation Wizard window, press Finish to complete the installation:

Step 12: Assign the Sound to an Aircraft

Use Addit! Pro's Edit Aircraft window to assign the sound to the Boeing T-45C VT-23. If you do not see this aircraft, you probably do not have it installed. First, press the Edit Aircraft button on Addit! Pro's button bar. When the Edit Aircraft window appears, position to the Boeing T-45C VT-23. Click on the Sound Name as shown below:

When the Select Sound window appears, locate "T-45 Goshawk Sounds" as shown below and highlight it. Press Select to choose this sound:

Step 15: Take Her for a Spin!

Finally, start Prepar3D and select the Boeing T-45C VT-23 aircraft and enjoy flying with your new sound package!

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