Install Desktop Experience from Server Manager?

Hi all,

I have just installed Window 7 RC Build 7100 and when i attemped to scan a document using my HP PSC 2400 series, it prompted a message indicating i should install desktop experience from server manager before it can be used. Does anyone know how i can install the desktop experience? When i was using Window 7 Beta Build 7000, my HP was working fine and could scan. Thanks for your help in advance!

I am having the same problem for my Lexmark 4300. i need desktop experience (would think its second hand for ultimate) it says i can install it through Service Manager. i don't even have servicemanagaer.msc so how can i do that. any help to download page Windows 7 Ultimate 64bit