Vista x86 to x64

Hullo. I'm running on Vista Home Premium x86, I want to make the transition to x64, simply put. I bought this laptop and it came with the Home Premium, OS is completely legit, and if possible I would like to keep it that way for once. So, that being said, how should I go about this?

Specs as follows:

Quote:

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Computer:
Computer Type ACPI x86-based PC (Mobile)
Operating System Microsoft Windows Vista Home Premium
OS Service Pack -
Internet Explorer 7.0.6000.16546
DirectX DirectX 10.0
Date / Time 2007-11-11 / 16:18

Motherboard:
CPU Type Mobile DualCore AMD Turion 64 X2 TL-60, 2000 MHz (10 x 200)
Motherboard Name MSI MegaBook L735 (MS-1717)
Motherboard Chipset nVIDIA GeForce Go 6100, AMD Hammer
System Memory 2048 MB (DDR2-667 DDR2 SDRAM)
BIOS Type AMI (01/10/07)

Display:
Video Adapter NVIDIA GeForce Go 7600 (256 MB)
Video Adapter NVIDIA GeForce Go 7600 (256 MB)
3D Accelerator nVIDIA GeForce Go 7600

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Bumpage :ermm: