Hmm, if any files have been encryted or privatised, this method may render some files inaccessable. To make sure that that doesn't happen, your best to used a brute force password decryptor.
There's a Linux Live CD (I forgot the name of it) that boots directly of your cdrom drive and it can brute force decrypt windows passwords. If I'd known the name, I'd tell you but I don't - sorry.