Swapped Hard Drives, Now Password Doesn't Work

[Gryfon19]

So I had 4GB 15" MBP that I'm going to sell and bought a 2GB 13" MBP. I put the "old" hard drive from the 15" into the 13" and it works like a charm. Except it doesn't recognize my admin password as correct. I know I'm entering the correct password - is there any way to resolve this short of re-installing the OS?

 

[spinnerlys]

Mac OS X: Changing or resetting an account password

via search for "mac os x reset password"