Mr Vai published a 10 and then 30 hour workout in guitar world. The 10 hour one is here - although I haven't checked the content against the orignal. There are some dodgy guys selling it as an ebook on ebay too if you want that.

There's all sorts of stuff in there, much of it no real use in my opinion. I did the 10 hour workout a few times years ago, and I also did the 30 hour one more recently to see if I could.... :D

loads of it is about finger independence, if you've acheived that there's not really as much here.

have you seen the satch lessons book? It's on amazon here and I found that ALOT more useful. I know you don't like to pay for things, but this book doesn't cost much and is well worth it in my opinion.