Hello..some questions before buying

[LancelotGr]

Ok my questions are:

If i use any of the "hacks", is this legal? I mean its allowed from the Vbulletin team or its not and therefore i will loose my support?

If i pay for the Owned LIcense, which i found it very cheap, i will not have to pay again every year?

How easy is to install the hacks? I tried to go in one of the hacks forums to see whats going on but it didnt let me as i havent bought the program. Is any other place where i can see some hacks?

If we have some ideas of things that we want to create in our forums..can we say these ideas to the vbulletin team and ask them for their help?
This help will be paid?

If we try to make some private forums, how they appear?
I mean can we have forums that are for some members and in others account will not appear and others that will be with a password?

Thats the most of the questions i have right now..sorry if many of them are very silly but i tried to cover all the questions that my members will ask me
Thanks a lot...