The Remote Desktop Client app is a pretty handy way to remotely manage/control a Microsoft Windows workstation. However, the solution Microsoft provided is a little bit outdated and runs on Rosetta, which hogs CPU and memory. An alternative way of doing this is by using the rdesktop program, which is open source for Linux/Unix.
First, go to their download page and download the latest source code. Extract the source to say ~/rdesktop. Then, we need to compile the program on Mac OS X. Open Terminal and cd ~/rdesktop, run the following commands:
$ ./configure
$ make
$ sudo make install
Finally, you can use X11 to run the rdesktop program.
Mac OS X Hints
http://hints.macworld.com/article.php?story=20060822152419110