Starting in the spring my 07 Swift started not starting on occasion. It always turns over strong, just no fire. After doing some research it looks like it is the ECU not waking up. The solution being to replace it. It always starts eventually, and its not a huge deal right now being summer. But come winter I do not want to be stuck for 15 minutes waiting for my computer to decide to cooperate. It gets bloody cold here in Ottawa. I have looked online, and there are used ECU's available but I don't want to end up going threw the hassle and expense of changing it and end up in the same situation. And I defiantly don't want to pay $700 for a new one from the dealership. I guess my real question is how much is involved in changing to a stand alone system. I have seen that there are a fair number of people on here and deawootech that have done it. Rewiring is not an issue for me. I am more concerned about the compatibility of parts. What will work, what wont, what would I need?

Any help is greatly appreciated.