In the past, it was incredibly frustrating for law school applicants to attempt to customize which schools received which LORs. Last week, the LSAC announced a new policy in this regard:
Announcing Upcoming Change in LSAC Letter of Recommendation Procedures
Beginning April 25, 2009, all letters of recommendation must be assigned to each law school to which you want them sent. Please check the LOR area of your LSAC online account to make sure all of your letters are assigned. Unassigned letters might delay the production of your law school report. Unassigned letters will not be sent to the schools to which you apply. To avoid delays with your law school reports, please assign all of your letters as soon as possible.