28 Jan 2008 12:22
Use Jubler subtitle editor.
Open multiple subtitle parts--> goto tools-> join files.
This is a very good subtitle editor with a lot of options to edit, join, resync.
Moreover, its a freeware and open source project.
Link to file download is http://www.jubler.org/.
It may take some time to understand it well. reading the help file can be useful.