Microsoft Dynamics CRM 4.0 TRIAL or TIME-LIMITED VERSIONS cannot be upgraded or converted to MSDN or BUSINESS-READY LICENSING (BRL - DYNAMICS PRICE LIST) licenses by applying a commercial license key. Customers or Partners who begin with the TRIAL version of Microsoft Dynamics CRM and wish to upgrade the TRIAL to either a MDSN or BRL license, will need to perform a new install using the MSDN download or PartnerSource product downloads (respectively), and import their original Organization; OR, must begin their implementation directly with either the MSDN or BRL non-time limited/production versions. For BRL partners/customers or developers who have already begun using the Microsoft Dynamics CRM 4.0 TRIAL, please refer to this Knowledge Base article for instructions and further information: Link.