Well, if you all would have read the original... judicious use of cut and paste to follow
<< except each modem would use a different ISP... Reason...neither ISP supports multilink...dont want to get a different ISP >>
Yes I've heard of shotgunning, no I've never "seen" it. And my ISP experience tells me to doubt you'll find many ISP's that support it since it takes special modems, or at least some hardware, allows one user to hold 2 lines, not good business for the ISP, and it no where near competitive for speed.
Sooooooooo, all of that taken in to account, You can dial in to 2 isp's if you want, and can maybe even swing it so you're using both lines, but NOT to combine your bandwidth. I'd rather not explain the routing behind it, but you can probably find it with the search button at the top.