adding more fonts to this theme, how?

Hi,
recently i discovered the world of Google Fonts, and there’s some really great stuff. Than i noticed that Purple Pro uses such a font but with all the generated files, including a stylesheet, from fontsquirrel.com.
So ilooked around there and got a bunch of my own choosing – but, now i ask myself how do i add in additional fonts with Purple Pro?? (Especially since i run a child theme of it, Purple Pro Fluid).

The “fonts” folder of PP is obviousely set up for that one font only, Dosis, no additional font can be added in there because the stylesheet for each font is always called stylesheet.css.

How do i do this??
Do i just add the style from any other fonts stylesheet to the existing one, so that i would, say, end up with 4 different font styles in one single stylesheet.css file and have ALL 4 fotns files in the very single “fonts” folder,
or, would i have to put every font in seperate folders – and thus create an increasingly complicated folder structure to fetch each font from)??

Any useful tips on this??