This is not a lender question, it's an IRS question. The credit is from the IRS, so I suggest you contact the local IRS Branch and ask them. If I was a betting man, I'd say this still qualifies based on you living in a portion of the property.....check it out and write back.
We believe the program specifies only the the property transaction needs to close by December 1, 2009 and that the home purchased needs to be your primary residence. We have not seen any deadline for occupancy of the home.
It might be worthwhile to review the attached resource: