make sure you work out a good response to the statement: "tell me a little about yourself" - I've been asked that one probably 50 times...
also, work out strategies for different interviewers - some places have you interview with 3 or 4 different people of differing status. put yourself in their shoes - for ex., a younger guy might be more receptive to someone good to work with, guy who's not an over-eager tool or who won't be a kissass that's going to cause him more work or show him up. an older guy/owner might be more interested in competence, maturity, and manner with clients. a "career" - type woman might be on the lookout for chauvinists or cocky-male types. and always try to get them talking about themselves and their "accomplishments" - its easier on you and puts them in a good mood.
I wouldn['t recommend scripting it, just to prepare for different types of interviewers and try to tell them what they want to hear....
good luck.