The frontpage password is just your DA account login password. (Although, it will remain the same when you change your DA password). If you want to manually change it, I believe they use a standard md5 crypted password in public_html/_vti_pvt/service.pwd, so you could generate your own password in php using:
and put the encoded password into the file.
But the absolute easiest method to fix the problem is as S2S-Robert said, just disable/enable the extensions. The password is the password you use when logging into DA.