Ya well, you will need a "plugin patch" for each release. I am not a CGI expert, but if we can translate the CGI code and apply it to PHP we can create a really nice mod.
I really don't care about making a "patch" for each release, the changes will be minimal and this guys release a new version every 3 months or more, which is not that bad.
Actually there is an excellent patch that modify the password stored in mysql databases. It works if you configure your server to store the passwords in MYSQL DB; in our case, the passwords are stored in shadow files, encrypted with md5crypt which is kinda different.
The patch is already done, with the preferences tab and all that stuff. We can take that patch, use the template files, and work over the "main core" file to make it able to edit the passwords in shadow files.
cPanel has a CGI script that let you edit the password in the e.mail accounts. Are you using that script? I mean, we can use it to start browsing the commands.