Upgrading to XFree86 4.1.0

[David C. Hacker, DVM]

I downloaded the XFree86-4.1.0-2mdk.ppc.rpm and
XFree86-libs-4.1.0-2mdk.ppc.rpm files and tried to install them with rpm -U
but got dependency problems.  Using --force just gives you 2 installed
versions when I do rpm -q XFree86.  What is the best method to isntall these
RPM's and get rid of the old XFree86 4.03?  Thanks
David