@wink - thanks for that!!
@smitchell I used phonegap in the end. I don't know what I've done in the last three days, but my game no longer works in appmobi and phonegap freezes if it has any sound files embedded. All the sound has been stripped out.
Next step is to get that darn sound working again :-)
Generating the keystore and pairing the certificates was a right pain for me, but sorted it after an hour or two...