Module version running

[Allen, Jack]

What is the best way to determine what version of a *.ko is really being
used? 

I know it is most of the time based on the kernel version located in
/lib/modules, but I need to determine if a different was loaded by a
script or manually. I also know that most of the time this may be logged
in /var/log/messages, but the system was booted several month ago and
the messages.X file for that day has already been deleted.

This is for Red Hat EL 5.3 and 5.4. 

Thanks: 
        Jack Allen