NBRT has viruses?

I downloaded NBRT today and prior to installing, had it scanned at www.virustotal.com.   There were 8 instances of reported virus/trojan/suspicious file from competing anti-virus programs including  AVG, F-Prot, McAfee,ClamAV and SuperAntiSpyware.

Are all those warnings false positives ?  I am reluctant to install NBRT until further clarification.  Thanks.