Supported by logo and info.

There are two parts to updating that panel - the graphic and the text information. To add the graphic, create any .BMP file, name it OEMLOGO.BMP, and place it in the c:\windows\system directory (Windows NT users - put the file in c:\winnt\system32).Immediately, that graphic will appear on the panel the next time you bring it up. You may have to play with the graphic size to get it to fit correctly in the allocated space.
To create the text information, create a text file named OEMINFO.INI, and place it in c:\windows\system (Windows NT and Windows 2000 users - put it in c:\winnt\system32). The format of the file is as follows:
[general]
Manufacturer=Top Cat Solutions
Model=Model:Tiger 92
[Support Information]
Line1="Administrator"Line2="IT Help Desk"
Line3="Top Cat Solutions"
Line4="Somewhere Unknown"

The first section, "[general]", lists the info shown on the System Properties panel. The second section, "[Support Information]", is optional. If added, then the "SupportInformation" button will appear. Clicking that button brings up a panel with the text listed.
Note, of course, that if your system has a manufacturer's logo and information you can remove it by simply deleting or renaming the OEMLOGO.BMP and OEMINFO.INI files