Disable in-game music and run your own playlist externally. Also, turn off "Field Growth Visuals" to improve frame rate on the Mini ISO's low-res textures.
If you can, get the full (includes the official expansion with forestry and new machinery). However, if your only option is the Mini ISO due to hardware or bandwidth limits, it will let you plow fields, harvest crops, and drive a Lamborghini tractor – just don't expect a smooth, complete experience. farming simulator 2013 mini iso