"I know it's installed on my computer but I can't use it since I don't know where it is..."
You can query the rpm package to find out where it installed things:
rpm -ql /pathname/packagename.rpm | less
See:
man rpm
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Be prepared. Create a LifeBoat CD.
http://users.rcn.com/srstites/LifeBo...home.page.html
Steve Stites