[Rivet] fastjet version for rivet

[Albert Knutsson]

  Dear Rivet experts,

I'm building rivet for CMS and want to use our own libraries only. 
Currently we are using Fastjet 2.4.0. My problem is that I can not 
configure Rivet with this version:

configure: Found fastjet library at 
/afs/cern.ch/cms/sw/slc5_ia32_gcc434/external/fastjet/2.4.0/lib/libfastjet.la
configure: Found fastjet header directory at 
/afs/cern.ch/cms/sw/slc5_ia32_gcc434/external/fastjet/2.4.0/include
checking for fastjet-config... 
/afs/cern.ch/cms/sw/slc5_ia32_gcc434/external/fastjet/2.4.0/bin/fastjet-config
checking FastJet version using fastjet-config... 2.4.0
configure: error: FastJet version 2.4.2 or later is required

Is there any major changes between 2.4.0 and 2.4.2 and a particular 
reason that I can not use 2.4.0 with Rivet? If not, maybe I can just 
hack the configure somehow and avoid this "block"?

Thanks for help in advance!

Cheers,
Albert