Hi Don,

I apologize for not answering directly to your question.

Why don't you shoot ZIP file back to a client through HTTP by setting Content-Type and Content-Disposition headers?

- client requests data by clicking on a link
- your server prepares temp zip file
- then reads it into a string variable
- sends back this variable as a new page

An example of ASP code:
Response.AddHeader "ContentType", "application/zip"
Response.AddHeader "Content-Disposition", "attachment; filename=somename.zip"
Response.Write(<...file-to-string...>)