Almost working...
Installed El Capitan through VM on Macmini 2,1
AutoDmg it
Restored on new partition
Which led me to be able to go to the installer menu
But no USB, so installed Rehabman's USBinjectall and fakepciid
https://github.com/RehabMan/OS-X-Fake-PCI-ID
https://github.com/RehabMan/OS-X-USB-Inject-All (all credit and copyright to Rehabman)
USB and all the rest is functional. I even removed those kexts and USB was still working.
Only issue, KPs after 15-30 seconds of use. Initially on
System uptime in nanoseconds: 135070116768
last loaded kext at 33842408104: com.apple.driver.AudioAUUC 1.70 (addr 0xffffff7f98f71000, size 28672)
last unloaded kext at 123159778124: com.apple.driver.AppleXsanScheme 3 (addr 0xffffff7f987d8000, size 40960)
So I removed the audio driver, then on the magic track pad kext then on another, etc...
Apparently coming from something in the Kernel, but my knowledge stops there.
In a nutshell, I can boot EC on the Macmini on GMA950 with SL kexts, move my mouse, use KB, but not stay there for very long until next reboot
Ideas ?