Here is a quote I copied from Diana at the Village about using fonts without installing them:
Using a Font in Elements Without Installing It
Be judicious about installing fonts you will use infrequently - like holiday fonts. For those fonts, there is a work around –
Save the font in a file
Click to open the font file - it looks like a sample page - minimize that screen
THEN open Elements.
That font will be available as long as you have both the font file and Elements open.
Open the Font File first, then open Elements - the downside to this technique - if you want to open a font after opening Elements, you'll have to shut down Elements, open the font - then re-open Elements.