It seems the waybackmachine is having server trouble and cannot find the weibetech utility downloads from crawls between 2005-2009 so Ive attached the files needed to flash a generic sil3512 SATA card to work in a mac for large drive support (originally pulled from WBM archive). The utility runs in OSX, so no need to back and forth between a x86 box and the target mac. My Blue & White powermac g3 boots 10.4.11 from one and I have read that these cards are bootable on old world pci macs back to 7.6 (I have only used the utility in 10.4.11 environment). Anyhow, thought I'd share.

One caveat - to use on a Quicksilver or Digital Audio Powermac g4s, you'll need to swap the voltage regulator from 5v to 3.3v for functionality. Stock cards will not boot in those respective boxes otherwise.