Hi! i just bought my first mac on monday. a 2.2 White macbook. it's pretty awesome but it's taking me a while to get used to it. my first question is about installing apps. when i d/led firefox, it was pretty straightforward. i just drug the firefox icon into the apps folder and that was that! my next app was colloquy for irc. when i downloaded it, it went into my downloads folder. i wasn't able to drag it into apps. after i opened it, a disk image showed up on the desktop. the only thing i could do with it was eject it. and that didn't do anything. after a restart, colloquy wasn't even on the computer! i had to download it again to use it. what am i doing wrong? thanks in advance!