Joomla 1.0 and PHP 5.3

Although Joomla 1.0 is no longer supported, there still are vast humber of sites running on that CMS. If you need to transfer Joomla 1.0.x site to webhosting with PHP 5.3.x, you may consider doing the following patches:

Edit configuration.php, and change:
$mosConfig_error_reporting = '-1';
to
$mosConfig_error_reporting = '0';

In the file /includes/Cache/Lite/Function.php  change line №92
$result = call_user_func_array(array($class, $method), $arguments);
to
$result = call_user_func_array(array($class, $method), &$arguments);

and line 100:
$result = call_user_func_array($target, $arguments);
to
$result = call_user_func_array($target, &$arguments);

And make another patch of file includes/joomla.php :
$params =& new mosParameters( $my->params, $file, 'component' );
to
$params = new mosParameters( $my->params, $file, 'component' );

Source: joomlaforum.ru