How to merge many .swm files to one .wim file

1.Download the Assessment and Deployment Kit (ADK) from MSDN subscribers download.
2.Install ADK by running adksetup.exe, and make sure that Windows Preinstallation Environment is selected (selected by default).
3.Copy your .swm files to path D:\
4.Open "Deployment and Image Tools Environment" as administrator.
5.Type "imagex /ref D:\xxx*.swm /check /export D:\xxx.swm * D:\install.wim Windows /compress maximum".
6.It will be exporting to install.wim file now.