huge Superbowl sandwiches in Manchester area?
1. Why? They are visibly impressive, but I usually think a tray of assorted 4" or 6" subs allows more choice.
2. Manchester, NH?
In any case, assuming NH, I know that Dannely's in Nashua is theoretically capable of making them (most of their subs are actually made from really long subs sliced up). They also do a land office business around the Superbowl. I'm pretty sure you can get them at Moe's Italian Subs, too. And of course, there is Subway, but you can probably do much better than that.
I don't think that Bob Shaw's will do a party sub (he might, ask him), but he makes a really good sub.
There's a place called George's in Raymond that does great, huge sandwiches. A friend makes a special trip from Manchester to buy them. They do pizza too: http://local.yahoo.com/details;_ylt=A...
Another place that does great sandwiches is SkyMarket in Nashua off exit 1. http://www.skymarketnh.com/