HI.
You can choose one or more of the following:
* Use Cisco manuals and samples:
http://www.cisco.com/univercd/cc/td/doc/product/iaabu/pix/pix_sw/index.htm
http://www.cisco.com/go/pix
* Use PDM:
http://www.cisco.com/univercd/cc/td/doc/product/iaabu/pix/pdm/index.htm
* Use Pixcript to help you get the basic syntax to use:
http://teachers.sivan.co.il/yizhar#pixcript
***
With any method you choose, you should consider weather you're going to use the "virtual http" server option or not.
You can try with or without that option, and select what best suites your needs.
http://www.cisco.com/univercd/cc/td/doc/product/iaabu/pix/pix_sw/v_63/cmdref/tz.htm#1037665
The newer pix version 6.3 supports local authentication ((or Tacacs/Radius).
Previous versions needed external Tacacs or Radius server if I'm not wrong here.
Yizhar