I don't know if there is a way to use a font w/o downloading it - unless it's one of the standards that comes with most PC's. I think you have to dl it to use it on your own machine.
once you download the font - you have to load it to your fonts folder on your PC -- usually under C > Windows > Fonts
then you should be able to use it in Word and Excel and all those other nifty MS-based programs.
The only thing about these fonts that is a bit irritating - you have to use them at a huge size to be able to read most of anything you write with them. They're great for headers and titles and such - but not so much for general text... just FYI
ANGELIZED FONT <-- if you have the Angelized font on your PC, you should be able to see this, I don't know if you can see it if you dont' have the font downloaded... it'll come up as something like Arial or some other default.