Ok. I don't know about the brushes (Sorry) but I can tell you how to use fonts.
1. Download the font and save somewhere you can remember.
2. I HOPE you're using PC because I don't know what to do on mac. Anyway you need to go to these folders in respective order. My Computer ===> C Drive ===> WINDOWS ===> Fonts
3. Now, If you did it right then you'll be in a folder called "Fonts."
Go to File ==> Install New Font.
4. A window should pop up with a navigator on the bottom, find your font and then click OK.
5. Open up PhotoImpressions and if you did it right then the font should be on your list as well as on your lists for ALL programs.
Hope that helped
Black-Rider-11