Okay, I thought I found a great resource (it's still good just not complete) for upgrading to DNN 4.8. I have followed the instructions line by line, all four pages and everything went well until I tried to hit the ..../Install/Install.aspx file to initialize the upgrade.

I get an error.... of course...

So in my research I read I needed to comment out the "sqlexpress" comment, but it didn't work. Plus it's in the old web.config file anyway, and it worked there.  So here is what I have, can anyone tell me what I am missing?

</configSections>
 <connectionStrings>
  Connection String for SQL Server 2005 Express
  <add
    name="SiteSqlServer"
    connectionString="Data Source=.\SQLExpress;Integrated Security=True;User Instance=True;AttachDBFilename=|DataDirectory|Database.mdf;"
    providerName="System.Data.SqlClient" />
  Connection String for SQL Server 2000/2005
    <add
      name="SiteSqlServer"
      connectionString="Data Source=SQLB16.WEBCONTROLCENTER.COM;Database=DotNetNuke;uid=(XXXXXXX);pwd=(XXXXXXXX);"
      providerName="System.Data.SqlClient" />
   -->
 </connectionStrings>
 <appSettings>
  Connection String for SQL Server 2005 Express - kept for backwards compatability - legacy modules
  <add key="SiteSqlServer" value="Data Source=.\SQLExpress;Integrated Security=True;User Instance=True;AttachDBFilename=|DataDirectory|Database.mdf;"/>
  Connection String for SQL Server 2000/2005 - kept for backwards compatability - legacy modules
    <add key="SiteSqlServer" value="Data Source=SQLB16.WEBCONTROLCENTER.COM;Database=DotNetNuke;uid=(XXXXXXX);pwd=(XXXXXXXX);"/>
    -->

Am I that dumb and can't see this or is looking at it now for 8 hours causing the problem? Any bit of help or advice would be great!

well I made those changes and now I'm getting a Runtime Error..... I give up.... I did EXACTLY as I was supposed to and it still didn't work. Thank for your help though.

It's critical that you do it right the FIRST time.  Once you make a mistake, it is best to start all over from the beginning.  Otherwise, it does not matter how well you re-follow the directions, it won't fix the problems you've already created.