I've been trying to find a complete compatible OSx86 install form my Dell Optiplex GX620.
I saw a link talking about using Boot-132 CD and a retail copy of Mac OS (which I do own a legal copy of Leopard 10.5.0 DVD) tried it and it didn't work, all I got was the gray Mac boot screen with the Apple logo.
But it looks like the generic Boot-132 loader I found my be too generic from My Dell Optiplex GX620. If anyone knows where I can find a specific
Boot-132 for the Dell Optilplex GX620, please send me the link.

Dell Optiplex GX620
BIOS: A07 (03/31/06)
CPU: Intel Pentium D 2.80GHz
CPU Clock Speed: 2.80GHz
CPU Bus Speed: 800MHz
CPU L2 Cache: 2MB
CPU ID: 0F47
Multiple Core Capable: Yes (Dual)
Hyper-threading Capable: No
64-Bit Technology: Yes (Intel EM64T)
RAM: 2.0 GB
Memory Speed: 533MHz
Memory Channel Mode: Dual Interleaved
Memory Technology: DDR2 SDRAM
PCI info: Slot ID - PEG VGA, Display
Hard Drive: Western Digital SATA 80GB (WD800JD-75MSA3)
Optical Drive: Sony CD-RW/DVD-ROM (CRX310EE)
Video: 8MB (Onboard/PEG)
Sound:
Peripheral's:
Integrated NIC
USB

i just installed snow leopard (10.6) on my gx520 by using iboot legacy, which is for older copmuters. it works just fine, except for the audio.