KDE and default fonts

[DT Wilterding <ldan swbell net>]

Foolish to worry over cosmetics, but often it's the little things that 
intrigue me.

Using RH7.2 --

To change the fonts used in KDE we are directed to the Control Center, then 
to Look and Feel, then Fonts.  I do dearly despise the default fixed width 
font that is installed (Arioso 10) and wish to change it.  Toward that end I 
have read the Help files, performed all indicated actions many times (both as 
a regular user and as root) and have been completely unable to to effect a 
sustained change.  

Also, I've been unable to locate a font named arioso (or Arioso) else it 
would have been summarily deleted.

Can someone please help?

Thank you,

Dan Wilterding