Using Remote Desktop 8-bit Color Depth
If you use a high resolution screen and windows server 2003 SP2 only shows you 8-bit color (256 colors) you can do the following.
See these links:
http://www.microsoft.com/en-us/search/DownloadResults.aspx?q=kb2685939
http://support.microsoft.com/kb/942610
Download hotfix:
http://hotfixv4.microsoft.com/Windows%20Server%202003/sp3/Fix205471/3790/free/330838_ENU_i386_zip.exe
After applying the hotfix change registry key:
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Terminal Server\AllowHigherColorDepth
to 1.