Mode 1 to 2
I am also in Australia (Melbourne) and bought a X-378 just before Christmas and yes, I too flow mode 2 (planes though). Purposely learnt this way a few years ago because I that it made more sense than mode 1.
Anyway, no the book doesn't show you the mechanics of swapping the controls over, just the programming change to the electronics, but it really is quite simple.
Put a towel down on your work bench, turn the TX upside down and remove the back cover. Basically you are moving the spring from the right stick to the left stick. That's it - if I remember correctly. I had to undo a few bolts holding the spring carrier and used long nosed pliers to unhook the spring.
Be careful not to drop any screws into the circuitry and check with your supplier to see if you would void warranty if you did it yourself. I took the chance, but have a good relationship with my local hobby shop. You may want to send it back and get it done professionally.
Regards,