You must first hook the HD into your PC w/ the jumper settings as slave or cable select(depending on your pc). Then you need to format it with Seagate's software(available from their site). Then you need to use Winhiip and select the PS drive and format it with this app. Now you should hook it back up to your PS2 and NA and be good to go. This was tested on a v1 PS2 and an 80 GB Seagate HD with an ethernet and modem Network Adapter. You can find Winhiip by searching for it. Post your results. Good Luck.