?n the Manual,

It recommends to connect 2 FirefaceUCs to 2 different busses.

I have a late 2009 MB Pro 2.4Ghz with 4GB Ram OS X 10.6.3 installed.
System profiler shows 2 different USB high-speed busses like below...

Do these 2 usb inputs go thru 2 different busses?
In other words, Can I use 2 FirefaceUCs with my Macbook Pro ?

USB High-Speed Bus:

  Host Controller Location:    Built-in USB
  Host Controller Driver:    AppleUSBEHCI
  PCI Device ID:    0x0aa6
  PCI Revision ID:    0x00b1
  PCI Vendor ID:    0x10de
  Bus Number:    0x24

Built-in iSight:

  Product ID:    0x8507
  Vendor ID:    0x05ac  (Apple Inc.)
  Version:     4.19
  Serial Number:    8H93T02A840Y3A00
  Speed:    Up to 480 Mb/sec
  Manufacturer:    Apple Inc.
  Location ID:    0x24400000
  Current Available (mA):    500
  Current Required (mA):    500

Built-in iSight:

  Product ID:    0x8507
  Vendor ID:    0x05ac  (Apple Inc.)
  Version:     4.19
  Serial Number:    8H93T02A840Y3A00
  Speed:    Up to 480 Mb/sec
  Manufacturer:    Apple Inc.
  Location ID:    0x24400000
  Current Available (mA):    500
  Current Required (mA):    500

USB High-Speed Bus:

  Host Controller Location:    Built-in USB
  Host Controller Driver:    AppleUSBEHCI
  PCI Device ID:    0x0aa9
  PCI Revision ID:    0x00b1
  PCI Vendor ID:    0x10de
  Bus Number:    0x26