From the website, it does NOT support Snow Leopard...
As of 2.3 it does support Snow Leopard and smbios.plist!

Edit:

Update 2.3.17

1. Boot retail Snow Leopard from DVD.
2. An improvement in loading Darwin/S/L/Extensions/*.kext



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Update 2.3.16

1. (only for windows)fixed the bug that will cause Boot Think installation failure when multiple disks in system.
2. fixed the bug that maybe result in Boot Think failure if there are fat32 partitions in system.

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Download:

BootThink 2.3.18_Mac
BootThink 2.3.18_Win

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Mac Inspiron 531 » 10.6.8 • 10.8.0 Legacy Kernel • AMD Athlon 64 X2 5000+ (2.60GHz)
Dell M2N61-AX/nForce 430/MCP61 • 4GB Dual Channel DDR2 667MHz
ALC888 • nVidia GeForce 8600 GT 256 MB
2 x WDC WD5000AAKS 500 GB SATA HDD