[exim] /etc/aliases

Dear list,

this is my first posting - and I hope, I am not asking dumb questions :)

I am trying to install the Fedora 2 RPMS from ftp.exim.org via

rpm -ivh exim-4.41-0_24.fc2.i386.rpm exim-mon-4.41-0_24.fc2.i386.rpm
exim-mysql-4.41-0_24.fc2.i386.rpm exim-saexim-4.41-0_24.fc2.i386.rpm

However, Installation always fails due to conflicts with /etc/aliases:

Preparing...                ###########################################
[100%]
        file /etc/aliases from install of exim-4.41-0_24.fc2 conflicts
with file from package setup-2.5.33-1

How can I solve this ? I am stuck here :)

BTW; what is the difference between exim and exim-saexim ?

Thanks and regards
Sascha