hi i want to build a site to connect to second life.
to create a way to use second lives unique user keys to make accounts
than store information on the site and can fill in more or edit it
and than be able to use it again in second life thru a HUD.
I know how to do the LSL (second life scripting) part and the design and css part

http://wiki.secondlife.com/wiki/Category:LSL_HTTP...

but am verly new to php
can some one help me out in were to start and some pointers
like what would be most likely be pitfalls on the way
do i need to have a db structure in place or can it be created on the fly?
can i use the User's in concrete or better not?

thank's in advance

Jeroen