Unfortunately this tool won't work with any linux distro using 256 byte inodes.
This includes all Ubuntu versions since Ubuntu 8.04 LTS and PCLinuxOS 2010 plus many other distros.
Presently there is no similar tool that can access 256 byte inode ext3\ext4 filesystems.
While Ext2Fsd will assign a drive letter to the 256 byte ext3\ext4 filesystems trying to open the volume will result in a dialog box asking if the user wants to format the volume.
Of course you do not so, selecting cancel will return an error message explaining that the volume "is not accessible" with the explanation
"The volume does not contain a recognized file system.
Please make sure that all required file system drivers are loaded and that the volume is not corrupted"
The linux folks have been using the newer ext3\ext4 versions since 2008 but the makers of these tools have not updated their software to accommodate the new versions.
The tool I like is a tool called ext2ifs by Stephan Schreiber it too suffers the same limitation.
It worked great until the linux devs started using the new versions of ext3\ext4.
It was a very simple program providing a Control Panel icon for ease of use and provided read\write access (though with linux care must be exercised writing to a root partition).
An email to Stephan promised an updated version of his program in the future.
That was in November 2008.