- bash /home/USERNAME/file.blah
The asterisks are:
Day of Month (1-31)
Month (1-12 or name (e.g. "May"))
Day of Week (0-6, zero being sunday, also can write "sun" for sunday etc.)
15 5 * * * bash /home/USERNAME/myheadin.sh
Will "bash myheadin.sh" at 5:15am every day (* is a wildcard).
Though, to answer your question, I'd bet there is a good guide out there somewhere.
Note: For php files, just replace bash with php in the example.
Also note: After the time entries you do NOT need the username on DH (compared to if you were using your own linux box).
Check out Gordaen's Knowledge, the blog, and the MR2 page.