You can think of a lot of creative ideas to fool the customs (declare it as something else/unbox it and ship) but there is still a huge risk at the end of the day and as been said a lot of times, the customs are no fools. Your best bet is to ask someone to bring back for you instead of shipping it.

You can take a chance and ship it back but you would have to be really lucky. You can see from the forum threads that most people end up getting taxed etc. Of course, Malaysia being Malaysia, if you can somehow talk your way into giving the officer some incentive, then you can escape having to pay 300-400. The choice is yours...