Confixx is a fairly popular Admin Panel in Germany to change certain settings in Confixx you can use an option called http special. Here are a few examples of values you may modify:

PHP Safe Mode (this is not recommended):

php_admin_flag safe_mode Off

PHP Memory Limit:

php_admin_value memory_limit 128M

PHP Max Execution Time / Max Input Time:

php_admin_value max_execution_time 120
php_admin_value max_input_time 120

PHP Max Upload Size / Max File Size

php_admin_value upload_max_file_size 32M
php_admin_value post_max_size 32M

PHP Open Basedir:

php_admin_value open_basedir /path/##user##

PHP Session Save Path:

php_admin_value session.save_path /path/##user##/phptmp

Confixx Mod Rewrite:

<Directory /var/www/##user##/html>
Options +FollowSymLinks +SymLinksIfOwnerMatch +Multiviews
</Directory>

Disable PHP functions:

php_admin_value disable_functions popen,escapeshellcmd,system,exec,passthru

The variable: ##user## will match your current user if you are changing settings for more that one user this is extremely helpful