Intergration & small scripts

1)

I need the main site account system to be integrated with flashchat and vbulletin.
Meaning, the register php file will create 3 accounts(main, flashchat, vbulletin). When login.php
is used, it will log into all three as well. When logout is used, it will log out
all three. Registering from vbulletin or flashchat will be disabled.

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2)

In files/vbulletinforum/flashchat/ there is a file named flashchat.php. This file
is part of flashchat. There is a php script at the top that was added to prevent
access to the chat if not logged in. What I need functioning is when using a link
with parameters such as http://domain.com/forum/chat/flashchat.php?username=_int_&room=1
that it will retain those parameters, "room=1" etc, and allow access when logged in.
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3)

Add a reply and comment bury system to the comment system in show.php, like the way
youtube.com has it.
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I will provide you with the ftp access and SQL, so you do not need to use your hosting.