Thanks osmarbcn.
After lots of tinkering I've managed to get Hazards Snow Leopard client server disc installed and running.
But now I have a serious problem.
After installing SL I was not able to boot Win 7 (which is normal I believe).
So I used the windows install disc to try to repair the Win install.
However, when it asks which drive to repair, none are listed and the repair fails.
I then tried the command prompt repair:
Bootrec /fixmbr
Bootrec /fixboot
Which also failed and left me with no chameleon bootloader.
I can boot into SL with Hazards disc. In Disc Utilities the windows partition is visible and is named "Untitled".
In BIOS none of my drives show.

Disc utility gives the following info on my Win partition:

Name: Untitled
Type: Volume
Disk Identifier: disk1s1
Mount Point: /Volumes/Untitled
File System: Windows NT File System (NTFS)
Connection Bus: SATA
Device Tree: IODeviceTree:/PCIO@180000/SATA@11/PRID@0/PMP@0
Writable: No
UUID: blah-blah-blah
Capacity: blah
Free Space: blah
Used: blah
Number of Files: blah
Number of Folders: 0
Owners Enabled: No
Can Turn Power Off: No
Cam be Formatted: No
Bootable: No
Supports Journaling: No
Journaled: No
Disc Number: 1
Partition Number: 1

Does anyone have any ideas how I can fix this?