PDshop has built in public variables that you can set from within any .aspx script.  Using the code examples below, you can set/override the title, keyword, and description meta tags dynamically with your own code.

Use code similar to this:

pd.title = "Your Title in quotes"
pd.keywords = "Your, Keywords, in, quotes"
pd.sitedesc = "Your Description in quotes"

Be sure to place this code just before the end of the Page_Load sub function in the Script section of the file.