There are two main ways of doing it: 
 
* storing the customer info on the URL as it's passed between each form or agent (look at hotmail.com for an example of how this can be done) 
 
* use server-side cookies (there's an article in Dec 1999 edition of www.dominopower.com on doing this, with sample db) 
 
Yes you can set a cookie from LotusScript or @Function but only by writing out a <META tag into the HTMLHead field.  see: 
 
http://support.lotus.com/sims2.nsf/802ee480bdd32d0b852566fa005acf8d/46e9956a7f48c9cc852565310072b337?OpenDocument 
 
The other way is to write some JavaScript that set the Cookie.  I prefer this because you can then test whether the Cookie was accepted by the browser (remember, users can choose not to accept cookies...)
  
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