To summarize if you've not read : you can netboot a Chihiro T3 directly or T1 with netdimm (no OR2SP on T1, just OR2), and netboot a Naomi 2 with a netdimm. With a security pic you can disconnect the computer after loading, without it you need to keep it running.
For CF (or SSD), you need a special CF reader (ask mitsu or build it yourself) for Naomi, just a IDE to CF (or IDE to SATA for SSD) for Chihiro T3, and a specific security chip. You will have to upgrade firmwares, using netboot, before using CF.