For general inquiries or if you need assistance in regard to your Xtreme Prototypes order, please use our general contact form.
Classic GLJ Model 25 Special Edition v2.1
NAA X-15A-2 Special Edition v2.0
Bell X-1 SG Research Aircraft v1.0
Our X-15A-2 Special Edition addon also has an online help system, in addition to the PDF manual. Online help systems are optimized for tablets and PCs.
If you don't find your answer there, please fill out the form below and we will try our best to assist you within one business day (all fields are required):
Product you would like support for:
GLJ Model 25 Special Edition Addon for Flight Simulator X and Prepar3D - DOWNLOAD
X-15A-2 Special Edition Addon for Flight Simulator X and Prepar3D - DOWNLOAD
X-1 SG Addon for Flight Simulator X - DOWNLOAD
X-1 SG Addon for Flight Simulator X - SHIPPED CD
Supported Simulation Platform:
Lockheed Martin Prepar3D v4.2
Lockheed Martin Prepar3D v4.1
Lockheed Martin Prepar3D v4.0
Lockheed Martin Prepar3D v3.x
Lockheed Martin Prepar3D v2.x
Lockheed Martin Prepar3D v1.x
Microsoft Flight Simulator X (FSX) Steam Edition
Microsoft Flight Simulator X (FSX) Gold with Acceleration Expansion Pack
Microsoft Flight Simulator X (FSX) SP2 with Acceleration Expansion Pack
Microsoft Flight Simulator X (FSX) SP2
I don't know
Windows XP with Service Pack 2
I don't know
Where did you buy your addon?
SelectXtreme Prototypes' website
Authorized reseller's website
Your Xtreme Prototypes Order Number:
(required if you purchased your addon directly from us)
Your Personal Software Activation Key* (including hyphens):
*: Please enter your activation key including hyphens. Note that it can be easy to mistake the number one (1) with the capital letter "I" and the number zero (0) with the capital letter "O".
How to find your software activation key: Your activation key was issued when you purchased your addon online. If you have purchased the CD-ROM version, the activation key is located inside the case. If you have purchased your addon from one of our authorized resellers, you still need to provide a valid activation key. Note that some third-party resellers use their own activation keys which are not recognized by our system. Please contact us if you have purchased your addon from a reseller and experience problems when entering your activation key.
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