[Newbie] self-updating J2ME application?

[Udo]

Hello.

I'm currently investigating possibilities of J2ME (more exactly:
IMP-NG). I have no experience with J2ME (just programmed some
test-MIDlets some years ago).

My question: Can a J2ME application upgrade and extend itself?

By upgrading I mean changing parts of the compiled binary; the
application downloads the new software version via GPRS and replaces
itself.

By extend I mean downloading an additional software component and run
it as a separate thread.

Is this possible? The target device will be any J2ME enabled GSM/GPRS
modem module (not a cellular phone with a display).

Thanks for any hints,
Udo