I also have the same motherboard, EX58-UD3R it hangs during installation... After black loading bar on the blueish screen with mouse... 1:10 CD spins, 2:40 please wait text appears, 5:00 CD spins again, 6:00 Language screen pops up. It also gets stuck on "expanding files 0%" for quite some time.
Vista x64 SP1 is currently installed but I'm still concerned about the setup issue! When the hard drive is removed it still hangs loading the vista setup. Memory had been memtested and removed down to one stick.
BFG Tech GS-550 550W
MoBo - GIGABYTE EX58-UD3R
CPU - Intel Core i7 920
DVD - LG 22X DVD Burner SATA
Hard Drive – WD 160GB 7200rpm SATA
RAM – G.Skill 16000/PC3-12800 3GB
Video - SAPPHIRE ATI HD 4830