Can anyone help me?

I have this little issue.

On the boot.plist file on my USB I have the -x32 flag set and when I boot into OS X via the USB it works fine.

But with the charmeleon installed on my HDD it always boots into the 64 bit kernal. I have tried editing the boot.plist file on my HDD and using the -x32 flag before booting into OS X and neither work.

Anyone know why this is happening?

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Hack Pro - G31M-ES2L, Core 2 Duo E4600, 4GB Kingston DDR2-800, Gigabyte 8600GT, 2x 160GB WD SATA, Sony SATA DVD Burner.
OS: Snow Leopard 10A380 (Vanilla), Windows 7 RC1

MacBook: Core 2 Duo 2.0Ghz, 2GB Sodimm, 160GB WD SATA, GMA 950.
OS: Snow Leopard 10A380

Hack Serve: Intel Desktop Board, Intel Pentium 4 (3.06Ghz), 1.5GB DDR, 1x 640GB WD SATA, 1x 1TB WD SATA
OS: Leopard Server 10.5.6