Thanks for the quick reply.
Yum-utils seems to be perfect for what I need!
I found it on smedev repo but it seems that I have to update yum >= 3.1.1 and python >= 2.4
I've search for a compatible rpm and I found this one : yum-utils-0.3.1-1.fc4.noarch.rpm
Would it be serious to install it on a prod server ?