Ashley I haven't been able to try it yet because I don't have a Windows Phone 8 devise to test on. I'm still shopping for a deal on a unlocked one here in the US.
But I have been in contact with Lorin Beer. Lorin is a Computer Scientist at Adobe, and is also the creator and primary developer of the Pender project.
Lorin was nice enough to join our community, and let us know about the Pender project. From the looks of it Pender will be targeting iOS, Android, WP7/8 and BB.
Here is the post:
According to that post the pender git repo should be updated in the next couple of days with (working) build instructions. Form the current instructions it looks like it is baked right into the project file, and then can be used on PhoneGap Build. As you intended how we should use Construct 2 , and PhoneGap.
This might be something you want to keep your eye on. Maybe you could use it with C2.