cheapest and easiest way to get vagcom cable
 

ok, so ive been searchin for awhile now but im just more confused. does anyone with a B7 have a vagcom cable and software? can you tell me which model will work with the canbus system? what is the easiest and cheapest way to get the best software? everything i find on ebay and stuff just says to download the software from rosstech but i dont wanna pay $99 for halfass stuff and $249 is way outta budget. any help is great :)