Well, if you get them from a certain website which im notallowed to say for rule reasons, even big ROM oinly take about 5-8 mins.
The games are amazingly easy to find.
It will not screw up your DS, it just acts like another DS cartridge, but you dont gt the welcome screen.
There are some pretty nifty themes for it too.
And to put them on the card for me takes about 1 and a half mins, depending on the ROM size, but i have an old computer with USB 1.1, so if you had 2.0, it would be much faster.
OS? thats a mac, right?
well, i have windows, so i dont know im afraid
Misread what you said.
Yes, the R4 is the best one there is IMO.
Better than M3simply, because it just... Looks nicer.
Oh and youdont have to flash the DS so you keep your warranty if it gets dropped or something ( that is, if you havent had your ds for over a year)