do you have anything that you need on the drive you want to install snow onto? if not, it might be easier for you to just repartition the drive again with diskutil, and create uuid partitions.

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CPU: AMD Athlon 64 X2 5000+
RAM: 2 x 1 Gb
2xSATA HDD
ATA DVDRW
MB Asus M2N Nvidia MCP61
Video: GeForce 8600 GT 256 Mb RAM
ADI 1988 onboard audio
Audigy soundcard
Realtek lan