What should we expect from offense this week?

Consider this: rookie QB Tarvaris Jackson will make his second NFL start, rookie Ryan Cook, who played center in college, will make his third start at right tackle, and undrafted rookie receivers Jason Carter and Martin Nance are slated to get their first NFL action Sunday.
But the St. Louis Rams don't exactly boast an elite defense (ranked 22nd in the NFL).
The hope for the Vikings is RB Chester Taylor. The Rams run defense is 31st in the NFL, and Taylor is motivated to finish this season out strong. He told me a few weeks ago 1,200 yards was an important number to top, and he also has to be disappointed about his production the last few weeks.
Nothing would mean more to him than have one last big game this season.