Allen Set to Come Back to the Niners?

If you read between the lines, it appears retired?49?ers guard Larry Allen is coming back for his 15th NFL season.? When asked on the team's web-site if he had heard from Allen, head coach Mike Nolan said "I have not.? He did call George Warhop (49ers offensive line coach) a week or two ago just to express his interest.? I think he's just going to leave everything up to his agent.? But I think that there is interest by him to play."? When asked about the possibility of staging a scrimmage with the?Raiders, Nolan said "We've discussed it with them and right now, it hasn't been set in stone.? If we did do something against them, it's been made really clear to both squads that it would be practices and not a scrimmage. And if we did it, it would be at their place in Napa."??