I create two products. One called PS2Netbox ,the other ,PS2USB network adapter.
PS2Netbox is designed for ps2 slim ( but can be used with ps2 fat with network adapter).
It use a simple network protocol for high speed communication. It can load and play game at almost like HDD on ps2 fat with network adapter.
PS2USB network adapter , is designed for PS2 Fat . With this adapter you can connect a variety of high-speed USB 2.0 interface storage devices.
Both of them use a custom OPL .
Players format harddisk with Exfat format , drag and drop game ISO to OPL\DVD or OPL\CD folder. No other settings is needed.
With PS2USB , you do not need fmcb or modic ,plug it to ps2 fat and power up , OPL will start with game list.
With PS2Netbox ,you need fmcb or mod-ic to start OPL.
Any suggestion are welcome !