I am not a whole lot of help, nut I have been up the whole dang night trying to figure out the same thing. To make a EXT2 on Easeus is quite simple..After doing it 5 times lol When you create a partition the options to chose in the drop/select like NTFS, FAT23..etc. It gives a choice of which...e.g the EXT2..The Easeus software doesn't provide support for EXT4
To make the EXT4 I used the software in this link. It is a free home edition, and is very similar to Easeus..
MiniTool Partition Wizard Home Edition - Free software downloads and software reviews - CNET Download.com
Hope this helps, Or maybe someone else will post before you read this. lol Pretty sure I am right on my information..