DrAzzy:
Enable verbose upload in settings. Set the IDE to the programmer/board/etc that you're planning to upload to. Try to upload any sketch (you don't need any hardware connected). In the black console window, there will be a line with the full avrdude command (with full paths for everything) at the top of the uploading section. Copy this into notepad, edit the path of the hex file to point to what you want, and then open a command window (cmd) and paste it in.
Sorry how being as understanding as a brick but do you have an example for that? can't see any AVR dude command for that....
Also I assume you then take those avrdude commands and paste them into a .bat file for a super simple op but how do you them get feedback for when the upload is done and if everything went on correctly?