If you install the normal screenfont:

Ê


you will see just one entry in your fontmenu:

Ê


Italic, Bold and BoldItalic are accessed through the style menu. 
Most software programs have keyboard shortcuts to achieve the same.




BUT, if you say: HO, IÕVE PAID FOR 4 FONTS, I WANT TO SEE FOUR!!
just install the alternative screenfont:

Ê



Than you will see all four fonts in your font menu.

Ê





I dont think this is a good idea, but FontShop does everything to satisfy you.
The choice is yours.