VNC Deployment Tool
http://www.realvnc.com/products/vnctool/index.htmlYou can use PSEXEC to deploy just about anything using an MSI, so you could take your pick of VNC softwares..... Or deploy it via AD I am sure, login script etc....
PsExec
http://technet.microsoft.com/en-us/sysinternals/bb897553.aspxRealVNC - VNC - the original cross-platform remote control solution
http://www.realvnc.com/vnc/index.htmlTightVNC: VNC-Based Free Remote Control Solution
http://www.tightvnc.com/Havent used them in a while, so not sure about enterprise licensing.... Think thier basic app is still free,.....