The software is free ... you just can't use the HD with your model! Go to LineSix.com and you'll find it there. You DO need a USB interface or a POD XT to activate it though .... there are SO many tweakable parameters. You gotta try it. At worst, the $99 for the USB interface will be all you need to spend if you can't borrow and XT.
Every instrument, every voice, every sound in nature ... these are are all my private tutors ... 24/7 for free, and all I have to do is listen.