To add clothing, having selected the garment from the clothing menu, click on the Double Tick at the bottom to add the clothing to the scene. After loading select the newly added article then go to the Figure menu and pick Conform To. From the new menue select the figure the garment will be worn by, usually Figure 1. If you are using a Mac, Renderosity freestuff files which download as Freestuffdownload.ez have to be drag and dropped onto the Stuffit icon to expand before being used. Convert these files to Mac format using the Poser Macconverter which I think is in freestuff as well. (I'm on the Windows one as I write and the System Admin person can see me, otherwise I will tell you exactly where it is)