renewing Canadian passport from USA as dual citizen

I was born in Canada in 1951 (Vancouver) and have traveled on a Canadian passport until 1991.
In December 1991 I became a naturalized U.S. citizen. The U.S. oath requires a verbal renunciation of your former country's citizenship, which Canada does not recognize. I have traveled on a US passport since Dec.1991 and I think my Canadian passport expired in 1993. I did not subsequently renew it. It seems through two US Supreme Court rulings and liberalized guidelines from the State Department, that the US now recognizes dual citizenship under many scenarios.

I contacted the Canadian Embassy in Washington explaining the above and was told that the best way to "re-establish" my Canadian citizenship was to apply and receive a Canadian passport. In so doing me have a few questions:

1. It sounds logical, but is the Embassy correct that a new Canadian passport establishes my Canadian citizenship?

2. I have my birth certificate and am this enough, plus the guarantor provisions, to establish my Canadian nationality for obtainment of a passport?

3. Can I apply from the U.S and use a US mailing address? I have not lived or worked in Canada since 1985.

4. From what I understand the Canadian law is clear and the American law is reasonably clear on dual citizenship. However, is there anything I need to know or do in order to not annoy U.S. authorities?

Thank you.

P.G.

US policy has not changed recently. They 'tolerate' dual citizenship for many years now.

1. You are and always have been a Cdn citizen. Only if you naturalized in US before 1977 would you lose Cdn citizenship. So, yes, getting a passport proves beyond question that you are Cdn citizen... the embassy would know the answer to this, no?
2/3. Yes. My family has renewed several Cdn passports from US. Look at the instructions.
4. The major differnce is that the US does not approve of its citizens identifying themselves as anything but US citizen when dealing with Govt. As such, you MUST enter US with US passport. As you have seen, canada doesn't care what passport you use to enter. US does. My 6-yr old dual citizen son cannot enter US on his Cdn passport, but has no problem entering Canada with US one.

So, you can get Cdn passport and use it wherever you wish ... except when entering US.