Is there a way to use/upload a custom gauge image instead of the default gauges?
Gauge is Flash component, not an image. You can use custom gauge through HTML template (possibly using Hosted file).
Hi John,
One of the simplest options would be to use an existing open source or third party JavaScript based gauge component and embed the code in a Template field (or a Script component in one of your Pages) to render the gauge.
For example, here is a jQuery based gauge component that lets you define custom color bands:
http://code.google.com/p/jsgauge/
A simple example is here:
http://jsgauge.googlecode.com/svn/trunk/src/example/jquery-example.html
...and source code for that example:
view-source:http://jsgauge.googlecode.com/svn/trunk/src/example/jquery-example.html
Hope this helps,
Matt