10.4.1 didn't worked usb for me
10.4.3 didn't works too, some hours ago

so what i have done to make this works
it's pretty simple:

1) Unload the these follow kext:
IOUSBFamily.kext, USBMassStorageClass.kext

Note:
You can also replace theses usb kext from 10.4.4 intel ones (give it with someone, i don't have anymore)
Install using terminal and load these non-working usb kext from 10.4.4 intel build

Its just a choice, unload kext or install the 10.4.4 ones.

2) Reboot or turn-off your machine

3) Grab your mac os 10.4.3 dvd and use pacifist to install this two usb kext as i said previously
- you will get these usb kext and install it from default location using pacifist using root privilegies

4) Go to disk utility and repair permisions of your installation disk

5) Reboot

6) On mac, un-plug your usb cable(s) from computer then plug it again and connect a device

7) Should work for you, i'm trying to get it working since the first betas dvd-non installable of 10.4.1 x86

I can use now my camera, psp, keyboard and mouse. My usb modem still don't working because lack of kext for this one

I decided to make this 'tuto' because some people having usb insues, and no one on this earth can help us to manage get this working. If you have usb insues, try this, should works for you like for me right now.

first of all thanks for the tutorial, i have some problems:
- where i can find those two .kext?
- how i can install it

- i cant find the .kext from the dvd.

so thank you so much for your support and sorry im a newbie

Yes, I´m having problems with USB on 10.4.5 and want to do this procedure, but could not find the kexts on the DVD.

Sorry for anything.