[Zope] How to pass argument to zpt

[DeHa]

Hi All,

I am newbie, and I have a problem(:. I try to make some forms showing 
data from MySQL about products. My structure is:

- formulator object
- zsql metod
- add/edit page template
- show page template
- python script to validate and redirect between add/edit and show
   script.

My problem is I don't know how to store value (global value) about 
product number (prod_no) which points to row in the table with product. 
Please help me (:.

Best Regards
-- 
Dawid Hulisz
also known as DeHa

Always look at the bright side of life
                           Monty Python