Sorry for the extremely late answer - my schedule is physically destroyed...
And, the answer (if nobody has answered): Hit the "Download" button left to the Preview image. After you've downloaded the file with your browser's help, go to Start menu -> Control Panel -> Fonts, and in the new window there should be File -> Install new Fonts... (or something similar like that).
Browse where you've downloaded the font file to, and install it.
Hope it was clear enough, if not, please tell - I try to respond faster next time.
Yes, you may use this font, just send me a link where you've used it, as I'm curious how it looks.
Again, sorry for the late answer...