So I am having a bit of confusion. Should I download my updates from the Apple Update, or the updater I installed with iDeneb?

Specs:
Intel Celeron 420@ 1.6GHz
Intel Express Chipset Family 82945G
1.5GB RAM
120GB SATA
Intel Board of some sort.

iDeneb installed fine, I just didnt know if updating it with this would hurt it.