[Technitian3]

Ninjamod is an ok chip, but there is little info on the Nm website. I had to search hi and lo to find a wiring diagram for a ver.C cube, and without a broadband adaptor it is practically useless as original bios have trouble reading ANYTHING. Upload updated bios (ver. 1.4, autoboot bios2 disabled!!!) via BBA and it will read decent +/-R media.
When installing the chip I recommend lifting the one leg on the orig. bios chip, otherwise none of your settings (NTSC/PAL, IP adresses,...) can be saved. Not a big deal on a PAL cube, as the chip defaults to PAL, but a rolling black and white screen every time you turn it on (NTSC cube) gets annoying. I have made more coasters for the 'cube than for my xbox and ps2 combined, but I've only had it a month and am still figuring out what works.
Some useful tools for GC backups are "fstfix gui" and "GCM utility" because, as stupid as this sounds, some GC iso's will only work if you convert them to a GCM file and remove the garbage that pads them up to 1.4 GB (GCM utility), then wipe the image and put back all the padding (fstfix) and burn using Nero.
BTW, R.E.4 works flawlessly, but some games that stream the audio will have issues (audio only), but fstfix can remedy that.
P.S. some of my burns wont go past the loading screen, so I'm gonna tweak the laser to see if it helps, will post my results.
One more note: rename GCM files to iso, then they can be burned.

Laser tweak didnt/wont help, at least in my case. Cube is new enough that POT was well within proper operating range.