Seamless Remote Desktop for Linux

Does anyone know how to connect to a Windows RDP server from Linux, and create a seamless integration between the two (window managers)? I have had a look at VirtualDesktop, rdesktop, SeamlessRDP but can't figure out how to work them. I know it sounds silly, but I can't work out which goes on Windows, which on Linux, where you should stick the IP address - the documentation seems to be made for people that already know what they're doing!