Wubi Auto-installs on unavailable HDD, copying img files to another folder

[cro]

OK, this is what comes of writing threads from memory...

My disk layout is as follows:
DISK0 (IDE), partitions E:, F:
DISK1 (SATA), partitions C:, D:

DISK0 is connected to IDE channel 0 (or 1 - whichever is the first one)
DISK1 is connected to SATA channel 0 (or 1 - whichever is the first one)

Following tests, I found the following (with only one instance of the wubi folder anywhere on any drive):
Copying \wubi to e: results in find --setroot failing
Copying \wubi to f: results in find --setroot failing
Copying \wubi to d: results in a proper boot and install.

The wubi folder I am using is a complete Ubuntu Feisty 7.04 install, patched up to last night, with NVidia 755 proprietary drivers installed and working, with a working implemetation of Beryl, with a 6Gb primary image file.

At boot, the find --setroot finds the /wubi/linux folder on hd(0,1)

And for completeness, here's fdisk-l when booted into Ubuntu (which sees both disks...):

Disk /dev/sda: 200.0 GB, 200049647616 bytes
255 heads, 63 sectors/track, 24321 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes

   Device Boot      Start         End      Blocks   Id  System
/dev/sda1               1       12210    98076793+   7  HPFS/NTFS
/dev/sda2           12211       24321    97281607+   7  HPFS/NTFS

Disk /dev/sdb: 163.9 GB, 163928604672 bytes
255 heads, 63 sectors/track, 19929 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes

   Device Boot      Start         End      Blocks   Id  System
/dev/sdb1   *           1        2550    20482843+   7  HPFS/NTFS
/dev/sdb2            2551       19929   139596817+   7  HPFS/NTFS

I didn't bother trying c:, I figure it'll work OK.