I'm sorry that I neglected to return to this thread. For the benefit of the archive...
rpm -e --nodeps Summit_LX-Silver-2.2-9.i386.rpm
doesn't work because you're specifying the name of the rpm file, not the name of the package as it will appear in the rpm database. Based on the filename, I would guess it to be "Summit_LX-Silver". If that doesn't work, try
rpm -qa | grep -i summit
to find a package with the word summit in, this is probably it.
Once you've determined the name of the package, use