I've already got this working, so my methods are tried and true. Once you have PDM installed on your PIX, you just need to add a few lines to your PIX config:
http server enable
http 10.10.1.9 255.255.255.255 inside
The first line enables the http connection capabilities, and the second line allows ONLY 10.10.1.9 to connect to your PIX using a browser on the INSIDE interface.
From there, all you need to do is connect using HTTPS from the IP address you specify in the second statement. Hope this is clear enough...