If you're curious about how to go about moving instruments around on a panel, swapping gauges from one aircraft to another, painting/repainting/cleaning up instrument panels, how to edit and write panel, aircraft, and other configuration files, or want to know how to use XML gauges in other aircraft, you might want to take a look/download the "Simple Panel Design" tutorial I posted on the panel design tutorials download site. It covers FS98 through FS2004, with reference to CFS1,2,3.
I titled the tutorial 'simple' because the only software tools needed are Windows Notepad and Windows Paint. It's a ten-lesson tutorial, with an accompanying workbook with hands on, step-by-step exercises to walk you through panel/gauge design stuff. Has much more (and correct) detail than the M/S panel SDKs.
Also has an in-depth explanation of XML gauges, how to write and edit them. It includes a workbook exercise on a simple conversion of an XML pressure altimeter to an XML radio/radar altimeter that can be used in any FS2002/2004 aircraft.
Requires Internet Explorer v5.0 or higher, or an equivalent XML-enabled browser. Readme web page has a contact email address for questions/problems.
Try it ;) ...