IIRC ext2srv doesnt understand the part:offset notation as dossrv
does.  You could make a FAT partition on the stick and put the ext2 as
image file on it.  Then you could left some space left free and use it
also with Windows to exchange some files.  But this depends on what
you want to use the stick for.  Other option would be to make usb/disk
understand partition control messages like sd does...  maybe thats
even the case...  My system here is not that up to date...  Still
using the usbsfs here.

cinap