1. Build environment

To build the system you need either mingw32 installed on Windows or a
mingw32 cross compiler running on unix.

2. Building

To build from Windows run make. To build from unix, edit rules.mak and change 
the PREFIX variable to the correct value for your cross-compiler, then run 
'make'.

3. Installation

Installation isn't yet automated, sorry. The system can only be installed on
the first partition which must be formatted for DOS. Set up a directory
structure like the following

make directories C:\reactos,C:\reactos\system32,C:\reactos\system32\drivers

Copy apps/shell/shell.exe to C:\reactos\system32
Copy subsys/smss/smss.exe to C:\reactos\system32
Copy services/dd/keyboard/keyboard.sys to C:\reactos\system32\drivers
Copy services/dd/blue/blue.sys to C:\reactos\system32\drivers
Copy lib/ntdll/ntdll.dll to C:\reactos\system32
Copy lib/kernel32/kernel32.dll to C:\reactos\system32
Copy lib/crtdll/crtdll.dll to C:\reactos\system32

The system can only be started from DOS. Copy the following files,
services/dd/ide/ide.sys, services/fs/vfat/vfatfsd.sys and
loaders/dos/loadros.com, to a suitable directory. The system can then be
booted with the command 'loadros.com ide.sys vfatfsd.sys'.