I've developed a small tool to help me change atlas lines fast and directly on screen.
Maybe it can interest someone who has to deal with changing many lines in new atlases.
You can load an atlas (automaticat detection of the type) and then change coordinates in lower 7 small text box. I have little time to write a full tutorial but I guess those who work with atlas can figure out quite well how it works.
Basically you STORE a selected data grid line in the lower textbox (both texture name and coordinates values) and then copy back to any line you select by clicking on the data grid and pressin WRITE ... TO SELECTED ROW.
You can even do multiple selection by pressing first the STORE MULTIPLE LINES button, then clicking on the starting line and finally clicking on the ending line. You will see a list of lines write down on the text box together with the relative values of the coordinates stored down in the numeric text fields.
From then you can load another atlas and write line to the new atlas simply selecting the starting line (maybe adding new lines if needed) and by pressing WRITE MULTIPLE LINES.
The program automatically put the correct suffix based on the atlas type.
FILL ALL ATLASES button doesn't work atm.
Hope you find it usefull. If you have any suggestion or request please do ask.
Download link:
http://www.gamefront.com/files/20382537/NTW+Atlas+Manager.rar
Install instructions: Just extract file in any directory and double click on file. It requires .net 3.51