How to customize check new images to fill in a few fields

[dneibert]

Right now when I use the "Check New Images" function, I have to enter nearly the same data for two of the fields. How can I make it automatic? Here are the two items:

I always have a larger download for every file so I would like the "Download URL" field to always be filled in for new images with:
/home/danane5/public_html/stock/data/1200/(name-of-new-image-goes-here.jpg)

In the "Description" I always want it to be prefilled with:
Model Release: NA
Property Release: NA


What code do I need to change so that it always does these?