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I am wondering how I could have framed my question here better, or whether I have asked it in the wrong place, and if so where should I have asked it.
On a forum, I might have asked ... anyone using EF5 TPT on Windows XP if so how do you get it to work?
My first piece of advice is to get rid of all the [Update] business. Write a coherent question that makes sense to someone reading the whole thing for the first time. Put the actual question at the top.
I went to your question to edit it a little - some backticking around inline code, a blank line before a code block so that it would format properly - but I didn't get far. I did find a line that said vaguely "I get error messages" and later an [update] that said what they were, so I brought the error messages up to where you said you get them and deleted the [update]. But then I ran into trouble.
When you solve one problem but then something else happens, don't keep adding more and more story into your question. Leave the first one alone - for example, it was a duplicate of something, fine, let it be closed as that - and ask a fresh one. When you get that solved, accept the answer for that one and if you now have a third problem, ask that as a separate question. Updating the question as drastically as you are invalidates old answers and frustrates people.
We've talked about this on Meta before: take a look at Exit strategies for "chameleon questions" and Guidance To Avoid Chameleon Behavior and see if you recognize your behavior. It's a great sign that you have come here and asked for advice. This particular aspect of SO culture is a little unusual.
