Generate two Visual Studio Solutions at same folder using CMake

Using CMake, I am trying to this:

Create two Visual Studio solutions at same folder.

eg.:

root
|
|-- myproject.sln
|-- myproject_x64.sln

Generated with command line (.bat file):

cmake -G"Visual Studio 10"
del CMakeCache.txt // POG to generate win64 in the sequence "CMake ZERO_CHECK will cry"
cmake -G"Visual Studio 10 Win64"

Inside cmake file:

PROJECT(myproject)

IF(NOT "${CMAKE_CL_64}" MATCHES "0")
    MESSAGE( STATUS "Generating x64 Solution...")
    PROJECT(myproject_x64)
ELSE()
    MESSAGE( STATUS "Generating x86 Solution...")
ENDIF()

(...)

Is it possible to do something like this ?

The CMake always generate ALL_BUILD project resulting this:

root
|-- source/header files
|-- unittest.vcxproj
|
|-- ALL_BUILD.vcxproj (used for last generated project)
|-- myproject.sln
|-- myproject_x64.sln

Is there a way to create subdirectories for (ALL_BUILD.vcxproj,INSTALL.vcxproj,PACKAGE.vcxproj, ZERO_CHECK.vcxproj) ?

eg.:

root
|-- source/header files
|-- unittest.vcxproj
|
|-- myproject.sln
|-- myproject_x64.sln
|
|---- depDir
        |
        | (used for myproject)
        |-- ALL_BUILD.vcxproj 
        |-- INSTALL.vcxproj
        |-- PACKAGE.vcxproj
        |-- ZERO_CHECK.vcxproj
|---- depDir_x64
        |
        | (used for myproject_x64)
        |-- ALL_BUILD.vcxproj 
        |-- INSTALL.vcxproj
        |-- PACKAGE.vcxproj
        |-- ZERO_CHECK.vcxproj

OR "preferable"

root
|-- source/header files
|-- unittest.vcxproj
|
|-- myproject.sln
|-- myproject_x64.sln
|
|-- ALL_BUILD.vcxproj (used for myproject)
|-- INSTALL.vcxproj (used for myproject)
|-- PACKAGE.vcxproj (used for myproject)
|-- ZERO_CHECK.vcxproj
|
|---- depDir_x64
        |
        | (used for myproject_x64)
        |-- Additional CMakeLists.txt if needed.
        |-- ALL_BUILD.vcxproj 
        |-- INSTALL.vcxproj
        |-- PACKAGE.vcxproj
        |-- ZERO_CHECK.vcxproj

Is it possible to do something like this ?