Mortgage_Master on "Changed Primary domain, now unable to access admin page"

I have a GD hosting account on which I swapped out my primary domain. With some manual link creation, I can get to the pages of the old blog under the new domain, as in newdomain/wordpress/page.htm

However, I am unable to get into the admin pages, getting a Page Temporarily Unavailable message. Yes, I should have backed all of this up before I swapped the name out. 70% of what is on the old blog will transfer over to the new one. I do plan to reinstall WP.

That being the case though, how do I get into the admin pages so I can pull the code out of the old blog?

Thanks,

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