As you will now be aware, the PhotoComp software has its own web link for image uploads and print registration. (You will find it on the COMPETITION INFO page in the left menu).
There is a lot of automation in the software, so it is no longer necessary to alter the file names of your images in accordance with the image naming convention published here on 24 April 2012.
The old method required a file name in the format: secfir_image_title.pdf. Now you can just leave the image file name as it is in your system and all will be well.
BUT NOTE: You must type the title of the image in the field labeled "Title:" immediately below the "Image File" name.