A common scenario that people want to accomplish is to extend the incident class to capture information about what customer organization is affected by a given incident. You can follow this simple pattern to add any kind of property to the data model and customize the form to show it.
If your screen resolution is big enough I suggest watching this video in 720p HD full screen (1280x720).
But I think that it would be a good idea to mention that you have to hide the extensiontab if you want the Clock to work.
Travis: Great Demo. Really shows people how to author forms in a simplist way. This saved me from having to attend a SCSM Configuration training. However, I noticed how you skipped over the formatting and placement of the label and list picker boxes and I see why now. The biggest issue my company is having is not creating custom forms, but how they appear in SCSM once you attempt format them in the Auth Tool. What a disaster. They end up all over the place, wrong sizes, other boxes get tossed around, etc. They look fine in the authoring tool, but once you load them into SCSM, they are totally out of whack and its very challenging to keep toying with it only to never get them to align perfectly. I wish there was an easier way to combat this problem rather then tireless trial and error. Hope this gets fixed in a future SP. But overall, great presentation regarding customizing forms from adding a new list perspective.
We have fixed most of the issues in the upcoming SP1 release that should be out very soon. Here is a shortcut though.... after you have made your customizations, double click on the original form in the MP explorer to bring it up in the center area. It will replay the customizations right there so you dont have to import it into the product to see your changes. Hope that helps a little bit for now.