Flash File Browser (server side)

Not sure if this best fits in this forum or in the AS one.

I am trying to develop my one file browser similar to the one on www.flash-db.com. However, their version is AS1 ! I’m wanting to learn to create my own version, so I’m looking for nudges in the right direction.

What are methods preferred out there? Is going strictly php and javascript the best way (eg http://www.betriebsraum.de/blog/2006/01/13/download-flash-8-file-browser/)? Are there other methods?

Thanks a ton guys, I’m looking forward to your opinions, links, and ideas. I really just want direction (nudges in the right direction) and preferred methods.