I tested Joomla 1.5.9 and installed a component.
http://bigal.comze.com/index.php?opt...xpose&Itemid=2
this is my findings:
After installing Joomla
chmod 777 the following folders in your joomla installation directory
cache
logs
tmp
if you are installing a component:
chmod 777 the following folders:
administrator/components
components
if you are installing modules or plugins
chmod 777 the following directories:
administrator/modules
modules
plugins
if you are installing languages:
chmod 777 the following directories:
administrator/language
langauge
change chmod back to 755 after you have successfully installed the components/modules/plugins/languages.