Hi, I've lost my data access to my admin area of zenphoto so i'm trying to insert a user and pass into zp-administrators table in mysql but i cannot set password right. I tried md5 and sha1 but don't work.

Please see the troubleshooting about lost passwords.

While it is in principal possible to hash the password yourself, we have done a pretty good job of making that impractical. Use the reset procedure in the troubleshooting guide.