Mocking with Boost::Test

I'm using the Boost::Test library for unit testing, and I've in general been hacking up my own mocking solutions that look something like this:

//In header for clients
struct RealFindFirstFile
{
    static HANDLE FindFirst(LPCWSTR lpFileName, LPWIN32_FIND_DATAW lpFindFileData) {
        return FindFirstFile(lpFileName, lpFindFileData);
    };
};

template <typename FirstFile_T = RealFindFirstFile>
class DirectoryIterator {
//.. Implementation
}

//In unit tests (cpp)
#define THE_ANSWER_TO_LIFE_THE_UNIVERSE_AND_EVERYTHING 42
struct FakeFindFirstFile
{
    static HANDLE FindFirst(LPCWSTR lpFileName, LPWIN32_FIND_DATAW lpFindFileData) {
        return THE_ANSWER_TO_LIFE_THE_UNIVERSE_AND_EVERYTHING;
    };
};
BOOST_AUTO_TEST_CASE( MyTest )
{
    DirectoryIterator<FakeFindFirstFile> LookMaImMocked;
    //Test
}

I've grown frustrated with this because it requires that I implement almost everything as a template, and it is a lot of boilerplate code to achieve what I'm looking for.

Is there a good method of mocking up code using Boost::Test over my Ad-hoc method?

I've seen several people recommend Google Mock, but it requires a lot of ugly hacks if your functions are not virtual, which I would like to avoid.

Oh: One last thing. I don't need assertions that a particular piece of code was called. I simply need to be able to inject data that would normally be returned by Windows API functions.

EDIT: Here is an example class set and the tests I have for it:

The classes under test:

#include <list>
#include <string>
#include <boost/noncopyable.hpp>
#include <boost/make_shared.hpp>
#include <boost/iterator/iterator_facade.hpp>
#include <Windows.h>
#include <Shlwapi.h>
#pragma comment(lib, "shlwapi.lib")
#include "../Exception.hpp"

namespace WindowsAPI { namespace FileSystem {

//For unit testing
struct RealFindXFileFunctio