As a relative newcomer to the forum I would like to say a big thank you to all those involved in developing CHDK. I am most impressed with all the new features now available to my A570IS.
I am now using CHDK version 0.5.5 with the timestamp feature added by Pethead and it works fine for date and time as well as adding custom labels, many thanks. When writing the label text file, I found that an extra return at the end of the last line prevented the file form being read; makes sense as the file is only supposed to have five entries.