I'm looking for an explanation or free, free online resources about organizing memory and managing memory on Windows systems.
You can buy this (old) book (the actual architecture of Windows has not changed significantly in 10 years) for a penny (used):
Inside Windows NT
Here is the updated version:
Internal MS Windows
There Also Flag Blog
As for the ONLINE resources, I found this to be a pretty rare option :(
Check out this DotNet Rocks podcast in the Windows memory model
The MSDN information is here: http://msdn.microsoft.com/en-us/library/aa366525(VS.85).aspx
Windows Internals is the canonical link for mm. This is much better than anything else you will find about this, as Lundy Wang doesn't write too much :)