Just plug it into your computer through USB mass storage. It will detect automatically if you leave it to finished the driver installation.

1. To download pc suite, just go to Nokia site and download it. Shouldn't be too hard to get the latest right?

2. If you installed the PC suite and still can't get the mass storage to work then. I suggest you try to plug the N900 as PC suite mode, then once it detected by the PC suite, just disconnect the cable and replug it again and select Mass Storage. This work for me, for my computer of cause.

hope it help.