After implementing the screenshot functionality for S60 phones, I wanted to add same thing for other phones as well. As there were some basics of the code for Nokia DCT4 phones, it was obvious place where to start.
After little of hacking, screenshots are working, for example this is screenshot of my Nokia 6234 I use for testing:
Support for Sony-Ericsson phones should follow soon, Németh Márton is working on it.
This is a great notice! Awesome app! :)