Installation of NBI Chameleon overwrites the Windows disk signature in the MBR

What steps will reproduce the problem?
With a working multi-boot setup that includes OS X and Windows 7, run 
NetbookInstaller with the "Install bootloader" option checked.

What netbook are you using this on?
Dell Mini 10v, but the issue affects all netbooks using NBI.

What is the expected output? What do you see instead?
It is expected that NBI would install Chameleon using the special fdisk 
binary supplied with the official Chameleon binary package (in the "i386" 
folder).  That fdisk preserves the 4-byte Windows disk signature in the 
MBR.  Instead, it uses the standard OS X fdisk, which overwrites the 
Windows disk signature.  This causes the Windows 7 boot process to fail.  
Restoring a functional multi-boot setup requires the user to go through a 
convoluted repair process.

What version of the product are you using? On what operating system?
NBI 0.8.3 final on OS X 10.6.2

Please provide any additional information below.
This issue (and the fix) has been discussed in more detail here:
http://www.mydellmini.com/forum/mac-os-x-development/16781-chameleon-
install-corrupts-easybcd-dual-boot-2.html#post131990

Original issue reported on code.google.com by jmc...@gmail.com on 18 Jan 2010 at 12:30

Merged into: #197

meklort / netbook-installer

Installation of NBI Chameleon overwrites the Windows disk signature in the MBR #189