Running great, but boot (not system) disk is old one I want to rem

>I have a Dell Dimension 5150 2x2.8 Ghz 3Gb ram, Intel ICH7 controller in
>AHCI
> mode (ie enhanced, but not using hw raid) with
> Disk 0 - dynamic 1 x 160Gb SATA
> Disk 1 - dynamic 1 x 400Gb SATA
> Disk 2 - dynamic 1 x 120Gb ATA
>
> with
> 0: 31Mb (EISA) + 80Gb (E: NTFS) + 70Gb (G: NTFS, part of striped volume)
> 1: 118Gb (C: NTFS, Boot, Page,Crash) + 70Gb (G:NTFS, other part of striped
> vol), + 70Gb (H: NTFS) + 120Gb free
> 2: 111Gb (D:NTFS System)
>
> The real problem here is that disk #2 (the old ATA one) is crucial to the
> boot process - it contains the \BOOT stuff, and if I disconnect the system
> doesn't boot.
>
> I tried copying the \BOOT directory & other hidden files in root onto C:
> and
> running recovery from the Vista DVD, but it doesn't find a vista install,
> even if the intel 64 bit AHCI drivers are loaded.
>
> How can I migrate the system stuff onto another disk without a reinstall?
>
> The system works great, but I want to swapout the old IDE drive.......
>
> bcdedit gives
>
> Windows Boot Manager
> --------------------
> identifier {bootmgr}
> device partition=D:
> description Windows Boot Manager
> locale en-US
> inherit {globalsettings}
> default {current}
> resumeobject {150be9ae-79ee-11db-836f-a03eec56ec42}
> displayorder {current}
> toolsdisplayorder {memdiag}
> timeout 3
>
> Windows Boot Loader
> -------------------
> identifier {current}
> device unknown
> path \Windows\system32\winload.exe
> description Microsoft Windows Vista
> locale en-US
> inherit {bootloadersettings}
> testsigning Yes
> osdevice unknown
> systemroot \Windows
> resumeobject {150be9ae-79ee-11db-836f-a03eec56ec42}
> nx OptOut
>
> I'm running Vista Ultimate x64