How about a starting helper ? :) :
int main()
{
HMODULE hLib(::LoadLibrary(_T("yourMainProcess.EXE")));
if (!hLib) {
::MessageBox(NULL,
_T("Please install..."),
_T("Your pack"),
MB_OK | MB_ICONSTOP);
return -1;
}
::FreeLibrary(hLib);
::CreateProcess();
return 0;
}