I'm sure Maya Posch has a highly active project called the ReactOS Synthesis Project (http://sourceforge.net/projects/reactos-synth/) which is supposed to patch a Windows install with ReactOS files - apparently it isn't dead yet and even she herself says that. And it's only been 795 days since that message, so it must be pretty well up to date.
I think it might be possible - but only to the extent where you're using the Windows bootloader. I've never tried it though.
On Tue, 14 Sep 2010 19:24:56 +1000, Javier Agustìn Fernàndez Arroyo elhoir@gmail.com wrote:
Hello devs, Few users at spanish ReactOS blog ( http://reactos.wordpress.com ) are asking about having both Windows and ReactOS installed in different
partitions at the same time...
And i wanted you to answer, rather than me... :P
What would you say? Is it currently possible?