The LasUm radio client is available from the website in a small setup file. It can be downloaded through the "Last. fm Scrobbler" link on the bottom of each page under the "Do more" section. When you are done downloading the setup file follow the instructions to install the software. During the setup you are asked if you want to install additional plug-ins.

These plug-ins are not essential for the working of LasUm but do help make your LasUm experience more personalized. If you decide to install the plug-ins, the setup will automatically detect the media players you have installed on your machine and gives you the option to install the corresponding plug-in.