Thought I would post this in case it helps anyone, and I apologize if this information is already here (I did search). I was running into a lot of trouble installing packages and Applications (specifically snes9x.app and Install360Controller.pkg) and finally found my issue. I was unzipping the files on my PC then using winscp to upload them to the Apple TV, and nothing was working. I then found if I upload them first then use unzip on the Apple TV, they installed without error and now work. This is the case for all .app and .pkg as they are 'directory files', which seems to confuse winscp. This may also be the case using other scp programs or operating systems, so if you are having issues, it is something to try.