Help please. Mac Pro 1.1 with YOSEMITE 10.10

[yusa28]

I´m on YOSEMITE finally on my MAC PRO 1,1,
my system:

YOSEMITE 10.10 (14A389)
Mac Pro 1.1
Processor: 2 x 2.66 GHz Dual-Core Intel Xeon
Memory: 16 GB 667 MHz DDR2 FB-DIMM
Startup Disk: Yosemite SSD HD (SSD 240 kingston)
Graphics: NVIDIA GeForce 210 1024 MB

Everything works GREAT !
But I can’t make software update to YOSEMITE 10.10.2 because doesn't boot any more. Any idea ? Help ? how can fix the boot ? Ej. Booting from another internal HD - With Mavericks and apply any script or a patch ???
Thank you.