Refresher on compiling .src.rpm packages?

It has been awhile since I have needed to compile a *.src.rpm package. Can someone walk me thru it. In particular I'm trying to get ruby-1.8.3 installed on SUSE 10.0 box. I have downloaded the ruby-1.8.3-3.src.rpm file from the OSS factory. I have done a simple "rpm -i ruby-1.8.3-3.src.rpm" and now have several files in /usr/src/packages/SOURCES and the spec file in SPECS. I have untarred the ruby-1.8.3.tar.bz2. What are the next steps? Thanks Greg -- Greg Freemyer The Norcross Group Forensics for the 21st Century