Voilà:
http://www.zshare.net/download/daxusb_package-rar.html
1. The folder "DAXZISO" needs to go on your psp, put it in the root, then click overwrite.
This folder has the usbhost.prx in it, and the .ini is configured to run the usbhost.prx, When you are not using the usb to play games, change the .ini driver values to null.
2. After you've copied that folder to your psp, the other 2 folders have to go on your pc. Copy them to somewhere.
3. Now load up dax with the usb cable connected, windows will say found new device.
4. You will then have to click manually install, and click where it says include this path in the search. Click browse and tell it to search in the PC_Driver folder. After this is done it should find a driver and install it.
5. Now your psp has the driver installed correctly.
6. Now copy the file cygwin1.dll to your windows/system32 directory.
7. Now run the usbhostfs_pc.exe in the USBHOST_PCSERVER folder. It should start and say:
USBHostFS Tyranid 2k6
Connected to device.
If it comes up connected to device when dax is running and the usb cable is in, then that means you've set it up right.
8. Now you have to put your isos in the USBHOST_PCSERVER/ISO folder.
9. For dax to refresh the list to view your isos, you have to go into game options and then click back. to go back to the iso list.
10. The isos on your pc should appear in dax, but they will be mixed up with the isos on your psp memorycard. so its best to call the isos on your pc something like game_usb.iso
with a usb tag or something.
11. Now select your game, use a direct load option, and then your game should start and play
Well done.