FrontPage: Using FrontPage with Addon Domains?

Yes, you can publish to Addon Domains using FrontPage.

After creating your Addon Domain, make sure to install the FrontPage extensions via your control panel.

Once installed you may then publish to your site using FrontPage "File -> Open Web" settings:

http://your_addon_domain_name/
When username/password box appears, enter:
Username: your control panel's username (same as your main FTP username)
Password: your control panel's password (same as your main FTP password)