TOPIC: Installation Error: PHP Fatal error:Maximun execut

I get the following error when I try to install JoomlaComment 3.26 in Joomla 1.5.3

[client 200.87.175.92] PHP Fatal error: Maximum execution time of 30 seconds exceeded in /home/....../public_html/libraries/joomla/filesystem/archive/zip.php on line 318, referer: http://www.......org/administrator/index.php?option=com_installer

Please help me

That is a shared hosting I suppose. The exectution time is too small. It should be at least 60 seconds to get the script installed.
In your php.ini file the line
max_execution_time = 30; should be changed to
max_execution_time = 60;
Greetings.