How to use the blocks

Hi guys,
First, let me say Geeklog is GREAT!

But I'm having a hard time to set up blocks. Might just be me, but it's not working to well for me right now :-(

I need to create a block that will have php and XML stuff in it, but all I see is the code, not the result. I'm using version 1.2.5-1

Can you tell me the difference with the 3 block types and how to use them please ?
Or where to get that information.

Tx guys!

Chrys
www.chrys.ca