Mod_top is a great tool for linux servers which shows realtime LAMP processes. This enables the system administrator to more easily determine what script is taking up all the resources.
For majority of the details, you can go here: http://www.mod-top.org/documentation.html
However, I have found that 2 things work better, with Cpanel anyway,
1. You probably won't have a 'php5' or a 'php4' directory. It will look something like /usr/lib/php/extensions/no-debug*/. You should just cp -R the lamp1701d.so file from your mod-top directory here.
2. Put ' extension=lamp1701.so' into the top of your php.ini file.
That should do the trick.