modifying another distro's rpm for FC4

[Claude Jones]

I seem to remember that there was an rpm command that could be run to take an 
rpm not built for FC4 and rebuild it for FC4 installation - or something to 
that effect. I read through the man rpm but didn't see anything that clicked. 
I tried a couple of archive searches but nothing popped up. Am I missing the 
obvious? What I have is an rpm built for PCLinuxOS which is a derivative of 
Mandriva - I'm told that those rpm's can generally be used in FC4 as there is 
a distant relationship in the distros. 
-- 
Claude Jones
Bluemont, VA, USA