If you can program, check out
ImageMagik; you can batch resize and rename, as long as you can program it.
Otherwise, I use MS Excel to rename files.
Get a directory list in DOS ( dir mydirectory\* > list.txt /B ), open up the list.txt file, paste it into Excel, write the renaming of it in another column, copy that into a text file and name it a "rename.bat" file and run it. Of course, that's a windows solution. Unix would be more of a shell script.