regarding dual boot with CRUX !

hej! I am ramachandran doing masters in telecommunication systems at Blekinge tekniska hogskola. presently I am working for a master thesis on Quality of experience and trafic shaping. we have CRUX installed in our LAB! but now, due to our personal requirements, we need to make a dual operating system along with CRUX . The other operating system would be Free BSD 7.3. im not an expert in linux! :( please help me, Thanking you, best regards, ramachandran.