I've seen numerous faked screen shots of Golden Sun 3 for DS and Wii, but I haven't heard any word of a real GS3.
I sure hope there is going to be one, tho... Golden Sun is my favorite game of all time.
If you mean 3.71 M33-1 to 3.71 M33-4, then yes. If you are on 3.51 M33-1 or 3.52 M33-1, then you need to upgrade to 3.71 M33-1 before you install 3.71 M33-4
I've actually never gotten that to work... I really wish I could, though, I spent a great deal of time in past years playing Decent on my Acer computer with Windows 95...
In order to run the Opera DS web browser, you need a slot-2 memory expansion. The EZ-Flash 3-in-1 is a memory expansion, GBA flashcart, and rumble pack. The 3-in-1 can work with the R4 with the help of one little homebrew app.
1. Depends on what kind of ROMs you want to play.
2. Only if you get a slot-2 device with enough memory (You'll also need some third party apps).
3. I'd recommend an R4 and an EZ-Flash 3-in-1. That's the setup I use, and it has served me well.