Is it an rpm, or src.rpm? It makes a difference on how you go about installing it. I know this has been aggrivating, and frustraing for you, but, hang in there. I'll stay in this thread as long as you stay with me.
good luck.

It's a "src.rpm" file.

First you have to rpmbuild filename.src.rpm, then once it's done, try upgrading the package, rpm -U filename.rpm.
good luck.

I write:
rpmbuild modutils-2.4.19-1.src.rpm

They tell me:
error: File //modutils-2.4.19-1.src.rpm does not appear to be a specfile.

Try this.

rpm --rebuild filename.src.rpm

Remember to be root or su -.
good luck.