If Slackware has the capability of remotely connecting through Remote Desktop Connection, surely there's a way of making it the host?

I'm currently using realVNC to have a graphical interface (not just myself that uses the Linux box in question) and it's dreadfully slow, any suggestions?

I'm not quite sure what you are asking. None of the slackware packages provide the capability to use Remote Desktop Connection technololy aka microsoft.

There are apps you can get like rdesktop that will allow linux to be a client to a microsoft terminal server.

There is nothing than can make it be the server though. Makes sense since it's a microsoft technology and you need to have a Windows NT Terminal Server, capable of natively speaking Remote Desktop Protocol. Windows XP home can't even do it becuase it doesn't have a Terminal Server.

Howver, there are many ways to do this using a different protocol. VNC protocol being the most common one I think.

Ah yes, the name of the application was confusing me, it is indeed 'rdesktop' that I was using to connect to a Windows server and as you say, it'll need to be something like a Terminal Server to speak to a protocol. Thanks for post in helping me identify why it wasn't possible.

You can use vnc over ssh and then just use putty to connect from the windows box. I am still playing around with getting it working properly but I am doing windows xp pro--->smoothwall router--->windows xp Pro at work.