I have created a tool which will download, unpack, patch, and repack a webOS Doctor image, applying a number of transformations along the way to:
1. Bypass the need for activation
2. Enable Palm Profile access
3. Set developer mode on by default
4. Increase the size of the /var partition to 2GB
See my blog post at rwhitby.net : The WebOS Internals Meta-Doctor for details.
You can find this tool in the WebOS Internals source code repository at github.com
The tool requires a Ubuntu Linux host to run. I encourage others to take the techniques embodied in the tool and create a cross-platform solution. This does what I need, and I'm not personally interested in creating such a cross-platform tool, but will assist anyone else who is interested.
Note that using Cygwin on Windows is no longer a supported MetaDoctor option. The official Wiki pages now require you to use WUBI on Windows and follow the Linux instructions after that. The option for using Cygwin on Windows will not be reinstated.
Do not redistribute modified versions of the webOS Doctor created using this tool – it is for end-user use only. Redistribution of the webOS Doctor (either original files or modified files) is a violation of copyright law.