Quiggy -
A simple rewording of your problem will avoid getting flamed for posting to the wrong forum ... this can easily be a Maya question ... "How can I reverse the order or otherwise change the numbering of a rendered sequence?"
There is a command line utility that comes with Maya called "imgcvt" which allows you to convert the formats of single or multiple files and rename or renumber them. Open a command shell and type "imgcvt -h" for a display of all the options. You can type "imgcvt -h > imgcvt.txt" to redirect the ouptut of the help command to a text file, then you can open the file with Notepad or wordpad or some other text editor.
Anyway, to answer your question ...
"imgcvt -r 1-200 -R 200-1shatter.@@@.tif backwards.@@@.tif"
will take frames 1 - 200 of your animation called "shatter" and rename it to "backwards" and reverse the order.
Read the doc to see what the symbols mean in terms of number padding.
D