Here's the documentation: http://codex.wordpress.org/Main_Page

The specific trouble I had after I reset the password the first 500 times :-) was that it sends your e-mail a message saying it has reset the password then sends another that the new password is _____ but if you keep trying things and keep telling it you need a new password (because it's very slow sending them) I kept getting confused and trying the "wrong" password at the wrong time.

Were I you, I'd delete the messages in your e-mail about the blog and then go directly and reset the password. Then I'd go away for a couple hours :-) I'd figure out which of the two new messages had the valid password and try to go on from there.

I cut and pasted the password since it was a random one I wasn't likely to remember but one time I included a space after the characters and it didn't work. So, make sure you only include the characters they give you if you cut and paste?