This is my question or sugestion.
I have some clients which don’t want to pay so i make dst-nat to apache serwer, where they get the message (html page). My problem apache don’t work property beceause he get too many connections from overdue clients. So could i make this message on MT?! He have something like apache, but where i can to run my message, where throw htm page!?
Thx for the answer and sorry for my english.
hotspot can do this and there is no need for a separare webserver.
http://www.mikrotik.com/docs/ros/2.9/ip/hotspot
all your paying customers will have to enter a username and password to use internet, the people that have not paid will not be able to log in
Yes, of course but if i have a lot of users so have enormous problem, beceause i must go to all my users to reconfigure the connection. This problem i can resolve in the same way with PPOE, DHCP… (guidelines: user can’t anything)
you don’t have to reconfigure your clients. hotspot will do everything no matter what your users have on their computers
I don’t understand, i don’t must give other clients passwords and usernames!?
yes you must. simply send all your clients email with username and password, then make hotspot. is that so hard?
Ok it’s not so hard but i want only say my clients “you don’t have the internet beceause you don’t pay me”, and change login way for hotspot i must rebult my all system which now is “full” automatic 
Now i make some update and modyfications on my apache config i will see if it’s work.
You don’t need to enable HS authentication features at all. Just customize HS login page and redirect all unpaying clients to it.
This is wery nice idea!
But in how way i can run the hotspot which will autorize all users!? Yes i known i can find this on http://www.mikrotik.com/docs/ros/2.9/ip/hotspot but i’m wery layze, could enybody tell mi what i looking for!?
Someone who teach you: if you want success you need to work for it. 
OK, I give up with hotspot and make something like miniserv http://lists.rulez.pl/lms/2005/6259.html - witch can only show one site but is wery fast. Now it works fine :] Thx for your help.