Okay, for the webcomic grabbing maybe something like this 5 seconds of googling brought me:
http://www.softpedia.com/get/Others/Fun/Woofy.shtml
Haven't tested, haven't looked further :P
If you have winrar, there should already be two commandline programs installed in C:\Program Files\WinRAR - rar.exe and unrar.exe, you'll have to run them from a commandline to see what the possible switches are, I don't know.
As for batch files, yeah, it would be a little more involved. Linux uses a different structure for directories, you can see this in arguments used like "~/somefolder" which expands to "/home/acidzebra/somefolder", which in windows terms would be like c:\documents and settings\acidzebra.
I don't know if windows has a direct "move" (mv) command, but I'm sure that could be done with "copy" and "del" too. I think a "find" command also exists in windows 2000 and later versions but fecked if I know the syntax.