ASP.NET MSSQL usage question

[Erik Jensen]

The MSDN article about using MSSQL with ASP.NET located
here:

http://msdn.microsoft.com/library/default.asp?
url=/library/en-
us/vsintro7/html/vxwlkUsingTerminalServersSQLServersOnOther
Machines.asp

Says disable anonymous access and make your web.config say:
<authentication mode="Windows" />

Insert the following line after the tag <System.Web>:
<identity impersonate="true" />

My Question is.. Will this disrupt my attempt to use
forms based authentication for my web pages? My current
goal is to use forms authentication for the pages but have
the ASP.NET application account have permissions to use
SQL server... oh.. and can I set up another ASP.NET
account that maybe doesnt have access to the SQL? (maybe
for another site or something)

Thanks
Erik