How do I change the max color depth for a RDP/TS connection?

How do I change the max color depth for a RDP/TS connection?

The following URL explains how to set this on the terminal / Remote Desktop Services server. 

http://technet.microsoft.com/en-us/library/cc772048.aspx 

The following registry path is the entry that controls this. Many times it is defaulted to 4, changing to 5 allows it to go up to 32bit. 

HKLM/system/controlset/control/terminal server/winstations/rdp-tcp ColorDepth is a REG_DWORD 5