Installation on Ubuntu is quite simple, tested with version 5.2.10 on Apache2 / Ubuntu 6.4:
Install with (sudo) apt-get install php5-ming
Restart apache
done!
You can check the installation with phpinfo(), it should show a chapter called "ming".
The installation notes for ming 0.3.0 say:
"Feb 2006: This module is for PHP4, not PHP5. Use the ming module that
comes with PHP5 if you are running PHP5."
This is a little confusing as the installation notes here don't explain how to do this with php5.
:-S