* Connect your phone to the PC.
*Open Nokia pc suite
* Click Install... on the tool bar or select it from the File menu.
* Select the *.JAD file of the application you want to install and click Install.
*An information box will appear when the installation is complete.
i agree with sadgurl ,
but most of the mobile stuff sites provide stuff in zip folder so you've just need to unzip before installing , it's very simple just like 1 , 2 , 3
so right click on downloaded game and select the Extract All option , you file will be on front of you , if you are browsing NokiaS60v5.com on mobile then you've need to install zip extractor that is available at help page of NokiaS60v5.com , I Love NokiaS60v5.com