https://forum.zonek.ro

Place the ps_rank.amxx into the plugins directory
Place the ps.txt (not the .sma) into the data\lang directory.
Place the ps.cfg into the configs directory.

Edit your ps.cfg with the required information asked in this file.
Edit your plugins.ini and modules.ini acordingly.

This plugin does have /rank, /top10, /top15 commands soo beware, plugin source for more info.