Lost the password of admin panel

It should be possible, but I don't know the db structure off the top of my head and don't have an phplinkdirectory install handy to look it up.

But the basic steps are:

1) login to the db, using a tool like phpmyadmin
2) find where the password is stored. It may be in a "users" table, or a settings table
3) Check to see if the password is stored in plaintext (with would be a security risk so it's unlikely) if so, you can just edit the password there
4) If it's hashed, try common formats like md5, you'll want to generate a hash of the password you want to use (you can find md5 generators through a search engine) and then update the db to use your new hashed password