I've developed a stored procedure to automate the generation of restore scripts. http://paul.dynalias.com/SQL/_layouts/15/start.aspx#/

The procedure is actually a single SQL query, you can specify a STOPAT point and it works out the FULL, DIFF, LOG files needed and generates the necessary script. It includes a CHECKDB at the end, ignores WITH COPY_ONLY , allows overrides to restore file locations using WITH MOVE and so on. It's better than anything else available free I can find.