@thesmb3fan143: That's rather complicated.
At first, you copy cmd.exe at the same folder where mass rotate is. Then, you open cmd.exe and drag mass rotate into the window.
For the next step, you either write rotate or scale.
Now, you write what format the GFX use (by default 4 but if you do stuff on like layer 3 then you use 2) and by how many frames the filed should rotate, shrink or grow.
Size means how many pixels the graphics you want to rotate or change its size is. Keep in mind that if you want to grow something you need put that thing in the middle of the field which is as large as the final size you want to have. If you have e.g. a 16x16 koopa shell block and want to make it 64x64 then put it into the middle of the 64x64 field and type 64 for the old size. The final size value is the pixels how larger the sprite should be multiplied by the value you want to make it larger (i.e. if you have got e.g. a 16x16 block and want to make it 32x32 the size values are 32 64).
For all three you also need to type the the input file. Drag it into the cmd window just like you did it with mass rotate and for the output file repeat that step except you delete the file number and write a new file unless you want to replace the input file.