What do I need to play back-up using Jap PS2?

[xclr8]

Well, I used to have modchip on my PS2, but I took it off. I am not sure what kind it was, but it couldnt play most of the back up games (CDR and DVDR), there were only a small collection of back up games that could be booted. I needed to boot using Utility disc and then swapped it with the back up games.

What's the best modchip out there for SCPH 10000? Will it allow me to play DVDR/CDR back up and is there I need besides the modchip (like a boot disc or something)?

THanks.