Oh, boy, oh boy... While I commend your efforts to do something along these lines (truly, it's awesome!), it is nowhere NEAR that easy, and you have a helll of a lot of things to research if you are indeed going to be doing this (although, of course, first-hand experience can never come close to interwebz research). First of all, let me just say something about location: if you plan on just moving to a foreign country, there's going to be a fair amount of issues involved, such as visas and the like - I wouldn't suggest telling them you are just planning on invading their country and living off the land, though
Most countries have a maximum amount of time you can be in them; although there ARE ways to get around this (ask cardboard!!), if you don't obey allll the nit-picky little regulations about living abroad, you could be in a world of hurt. Hawaii's good, though; Hawaii is amazing, Hawaii is expensive as sin. I'm assuming you're going to be 'squatting' there; although some of the islands have VERY few inhabitants, and it is possible, the islands are just that - islands, and it's damn hard, even while existing in the 'wilderness,' to not be treading on somebody's toes, in terms of property rights, etc. Maybe I'm just in a negative, pessimistic mood, though, and it's alllllll ggooooooddd, man.
I don't even want to begin to address all the other issues, but I'll just ask you this: have you worked on farms/have experience growing food (and I mean, a fair amount of food), or is that not included in 'technologies,' and you'll be able to go to the grocery sto' to pick up supplies? Truly, it's possible; many tribes/cultures subsist on fish, tarot/cassava/breadfruit (or some other 'carbohydrate rich' staple), and fruit and vegetables. Fishing in Hawai'i is kinda crazy, though, often involving spear-fishers and massive lung capacities.
Like I said, I don't wanna knock your dreams, but there's a whole HELL of a lot of people in this world who harbour these fantasies of just 'escaping into the wilderness' and living off the land. Unless you've already done it for a somewhat extended amount of time, I wouldn't suggest buying plane tickets to Malaysia quite yet.
But hey, you've got 2 months, and could have been planning this for years, for all I know. It just sounds a little... whimsical, at least to me. Try checking out the 'island squat' in CO, or visiting some other self-sufficient communities before you take the plunge, then you'll have some semblance of what you're in for.