KeyChain Access Password denied

Hello from British Columbia ...

I am assisting a friend who could not remember her Admin Password - we intend on upgrading her MacBook (Intel) from Tiger to Snow Leopard.

I booted up the MB from the Install disk CD and put in a new AP and then restarted from the MB Startup Disk and all went well.

Then I start getting a screen from Keychain Access asking the password which is of course NOT the one I just installed which btw works fine otherwise.

I go to KCAccess and note that all the previous entries are there. I do a Repair withintg KCA, it accepts my new AP but I then subsequently later on get the window once again for my KCAccess password.

I trust I am making myself clear and would appreciate your collective advice.

Thanks

Ron