You can add a build number to the System Properties General Tab without
editing the registry by creating an OEMINFO.INI file in
%systemroot%\System32 with Notepad, and add your own lines under these
sections:

[General]
Manufacturer=Type manufacturer name here
Model=Type model name here
[Support Information]    <--- this section is optional.  it will cause a
Support Information button to appear
Line1=Type something here
Line2=Type something here
Line3=Type something here

You can then create a BMP file with the build number you want displayed on
the System Properties General Tab and save it as OEMLOGO.BMP in the
%systemroot%\System32 directory.  The requirements for the OEMLOGO.BMP file
are:

Size:    108x114 pixels maximum.
Colors: 256 minimum (24-bit color is allowed)

Note that you need to fill at least 2 or 3 of the corners (1 pixel size) of
your OEMLOGO.BMP file with a "blank" color (white), to have it display
properly. The white color is shown as transparent (useful as background if
the bitmap logo is smaller than 180x114).

Mark Wilson [MS]