I am very new to owning a "tablet". I have the Dell Streak 7. I have both the Nook and Kindle apps on it. I was given a disc from a friend though with lots of free books. I cannot figure out how to put them on the Streak though. They are in the Mobi format but I can change that. I tried moving the files over to the streak on my computer but when I am on the streak I cannot find them. I put an ereader app on the streak but cannot figure out how to add the book files to it. Please help!