can you plug in two usb devices and a firewire device, all at the same time?? into macbook or macbook pro.... macbook manual says, one high powered usb device can be plugged in. but i dont know if they mean into each port, or at one time in total. i just spoke to apple, and they told me to call support. i havent even bought the laptop yet. i want to plug in a fast track pro audio interface = usb a mouse = mouse, akai mpd16 drum pad = usb, and a 7200rpm firewire external hard drive..........so all my ports i wanna be using at the same time. is this possible? or will macbook and the macbook pro differ in performance regarding this issue? say if i buy a usb hub and plug in 5 usb devices...........possible? or is their limitations?? thanks in advance.