Instructions for saving/printing from a PC: Open the files by "right-clicking" on them (with the right button on your mouse) and choosing "Save Target as....".
Save the file to your harddrive. Open the files with Acrobat Reader and "print" it like any other document.
Instructions for saving/printing from on a Mac: If you have Acrobat Reader set as the default in your browser preferences it should just launch the plug-in and open in your browser window after clicking on them. Print them as you would any other document. Or you can click on the files and hold down the mouse button until the menu of options pops up. Choose "Save this link as...." and download the file to your harddrive. Open in Acrobat Reader and print it.