PDF format

Hello again all,
I just downloaded a full book in pdf format, I already have acrobat reader but when I opened it up it was password protected, does anyone know how I could get around this?

Or could you explain how I may be able to use a password cracker from the archives on a PDF file.

Eeep... Hmmm... trying to remember where... ok try this http://www.password-crackers.com/crack/guapdf.html (Can't test it right now, sorry) and tell me if it worked ! (pm would be appreciated since I don't always re-read all the threads!)