Welcome to SimViation, fatbird.I'm glad to find someone else who is interested is aircraft instruments & GPS. The more the better.
If you're interested in building your own
desktop GPS, as opposed to mounting a GPS in a
panel, you may want to check out the following:
GPS!!!! . WHAT A DIFFERANCE THIS MAKES! Click here . The post is a few years old, so the pricing may have changed, but the info is still useful.
This setup has changed slightly, but it'll give you an idea of how I use it as a desktop GPS.As to your VSR & DIS questions, they might be better answered by the originators;Here's the
Kronzky website for the 500WX. It would be best if you get his permission before altering his code. His email is at the bottom of his main page.
I did find the Garmin website where you could
ask those questions.
Who knows, if you have a better idea on how they could improve their equipment, you might want to contact them first. After all, I doubt that Kronzky would offer you a job.