Is it acceptable to reinstate a retired asset in the tax books only and leave it retired in Corp?

We erroneously retired several assets in Dec-09 in the Corp book and then we closed the fiscal year.  The retired assets have no cost, no life and no accum in Corp but do have cost in Tax. The tax books are still open for Dec-09 and thus are still in the same fiscal year as the retirement. What issues would we face if we reinstated the assets in the tax books only?  We do have "Copy Retirements" checked for our tax books so should we expect the asset to be re-retired each month, or will the Periodic Mass Copy pick up only new retirements made in the current period?