havent had any problems installing extensions until hotspot. i even tried intstalling on a fresh joomla install with the same error
JFolder: :files: Path is not a folder. Path: /hermes/bosweb/web028/b281/ipg.hangspotorg/hss/tmp/install_4f0d0dfd92a95
JFolder: :folder: Path is not a folder. Path: /hermes/bosweb/web028/b281/ipg.hangspotorg/hss/tmp/install_4f0d0dfd92a95
JFolder: :files: Path is not a folder. Path: /hermes/bosweb/web028/b281/ipg.hangspotorg/hss/tmp/install_4f0d0dfd92a95
JInstaller: :Install: Cannot find Joomla XML setup file
thanks