How to replace files in Sharepoint Solution wsp file

1. Change the .wsp extension to .cab ( eg. mySol.wsp to mySol.cab )
2. Open with winzip and Extract to a directory eg. c:\kopperla\Ext
3. Repace the files that you want to change.
4. Download Microsoft Cabinet Software Development Kit (cabdsk.exe) from http://www.pixelsplasher.com/_downloads/software/Microsoft-Cabinet-SDK/
5. Run cabdsk.exe and extract the files to a folder eg. c:\koppela\cabdsk
6. From the command prompt cd c:\kopperla\cabdsk\bin
7. Run the following command
8. cabarc -r -p -P "kopperla\Ext\\" n mySol.wsp c:\kopperla\Ext\*.*
9. The new solution mySol.wsp is created in c:\kopperla\cabsk\bin directory.