I guess you have some harddrive / harddrives setup / bios problems.
Update bios.
Disable RAID.
Disconnect all drives.
Connect only one HDD (master) and one CDROM (slave).
Install (MBR partition scheme, 2 partitions (install to first, name it for example "Leopard", format HFS+ Journ.).
Activate first partition after install. ("blinking cursor" solution for MBR)
Boot to installed OS X.

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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