The easiest and cheapest way would be to directly connect your laptop to the tv. If you have a S-Video out port on the laptop, a simple S-Video to Scart cable will suffice.
A friend who travels extensively has just purchased a media HDD enclosure from Maplins (the actual drive is purchaed separately) so whenever he stays in a hotel, he simply plugs this in to watch his own films or listen to his music.
I currently have a setup which allows me to wirelessly stream any audio/video content to my TV from either my desktop or any other laptop. However, in may case, this involves having another laptop which is permanently connected to the tv.