All other distribution have instant reboot issue on Phenom as far as i know. Some EFi compability problem. Have tested Zephs 10.5.2, Leo4All v1, v2. Just one distro doesnt not have this issue and it is Zephs 10.5.1.

So if can boot from your install DVD (others than Zephs 10.5.1) you are lucky one and you dont need steps i discribe in first post. Just pick fresh one and install.

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Zephyroths OSX 10.5.1 distro upgraded to ... 10.5.6 , Voodoo kernel... downgraded to 10.5.4 to get USB working again! (with help of iPC distributive)
AMD Phenom X4 9500, MSI K9A2 CF,AMD® 790X (SB600), 4GB DDR2, ATI HD3850
Disable TLB fix http://www.infinitemac.com/f19/pheno...isabler-t2316/
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Compaq Mini 311c, Windows XP SP3 and Snow Leopard 10.6.2 http://myhpmini.com/forum/viewtopic.php?f=17&t=3302