Gail Futoran wrote:

My sister lives in southern New Hampshire and
has a friend who wants to plant a rose with
these characteristics:
-against a concrete wall with the full sun from 10:30
to about 3:30. It gets hot.
-survive NH winters

Well, Gail, since you have had no bites, I'll go ahead and state the
obvious. How about one of the Buck or Explorer roses well known for
surviving tough winters?

Also, this site:

http://community.webshots.com/album/17302325lVBOmIpHIu

suggests that many of the hybrid teas and other modern roses may be grown
there. Don't know about winter protection, but you sure could contact the
owner and ask.

Good luck.