how to impersonate a user for connection string in web.config

How do I impersonate a user in Sql 2005.
Right now I have user instance=true
The user is for public use of the data in SQL.
I am confused with the IUSR and ASPNET users.
ForestDumpAsked:
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divinewind80Commented:
Can you show the current connection string you are using in web.config?  In fact, it wouldn't hurt to post all your web.config.  

Is IIS and SQL on the same or different servers?
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ForestDumpAuthor Commented:
Hi divinewind80:

First. Does impersonate fix the following.
My development system is Vista enterprize/iis 7.0/sql server 2008
The web site is a sample/starter kit Fabrikam asp 2.0 using the sqlprovider
by the way the xmlprovider works.
I have set security in the SQL Mgt Studio for user/mappings/roles

I believe what I am trying to do should be simple.
Though I want to check to see if all the parts will work together.
What parts would you use?
What is the best web starterkit to use with Vista/iis 7.0/sql 2008?

Thanks,

ForestDump





webconfigSample.txt
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