If you need to create MXP files to easily distribute your components and extensions, we have a document on the MXI file format (which is used to create MXP files).
You can find the document here.
Creating MXP Files
Created
Fri, 30 May 2003 12:09:01 +0000
Modified
Fri, 30 May 2003 12:09:01 +0000