hi all. i installed zephyroth 10.5.1 on my PC. installation goes nicely.
but then After rebooting and taking DVD out. my pc dont find anything bootable on my HD it says: Please insert media to boot or... something idont remember.
do i need install grub or something? i have tested two times!

sorry i dont speak english and im noob with Mac. I have only one drive!

AMD Athlon 64 4200+ X2
Asrock ALiveXFire-eSATA2
ATi Radeon X1950 Pro
160GB HDD Western Digital
LG DVD+R/RW Writer

Ubuntu Linux 7.10 (Gutsy Gibbon)

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Leopard 10.5.2 - AMD Athlon X2 5600+ @ 3.01Ghz - 4Gb DDR2 800Mhz - ATi Radeon HD3870 512Mb GDDR4 - 2 SATA HDD 80Gb + 320Gb.