Here's what I'd doThat gets rid of your old hackman installation -- you don't need it
That moves your file to a new location. ThenThat should do it! Good luck!
rm -r /var/hack/TivoWebPlus
mv /var/hack/hackman-V7.1.0.tgz /hackman-V7.1.0.tgz
cd / tar xvzf hackman-V7.1.0.tgz