Hey! These are just questions, not going to do anything (atleast yet).
So, if i do a website, wich has a Forum.. What do i have to do to it, if i download ... phpBB forum software?
Changing shitload of things & configuring SQL .. what else?

You'll need a host.
Otherwise that's about it...

Only?

Okay, what about; if i use 000webhost. If i upload my forum files there, is it usable?
can i edit & config stuff ?
(It's free, that's why i took that kind of example.)

So i had a site with a shitty Sub-Domain, but it would work?

if you plan on having a decent amount of users, then dont get a free shared server, you will run out of space in no time. im sure jsp is running off of several servers.

this


for any sort of forum style website , you'll want to be on your own VPS or Dedicated server , shared hosting accounts , free or even paid for would be a terrible idea for a forum style site .


if you have any questions, PM me , i work for a web hosting company and would be glad to answer any questions for ya