How to extract files out of SharePoint service Packs and CU?

All,
 when we are doing scripted SP installation, we are looking to have all files at one place so that we can update the SP with all updates in once. But .exe files doesnt get carry from the scripts.
 Below is the command we run to extract the files and put in our CU updates folder.

1) Open cmd
2) "D:\Software\Office 2007\microsoft_office_suite_service_pack_2_x64.exe" /extract:"d:\updates\CUExtractFiles"