|Exhibit 99(d)                                                                                                                                                                                                                                                      
|-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
|ESI TRACTEBEL ACQUISITION CORP.(the registrant)Certification Of Periodic Report                                                                                                                                                                                    
|I, Mark R. Sorensen, Treasurer (equivalent to the Chief Financial Officer) of ESI Tractebel Acquisition Corp. certify, pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, that:                                                                            
|(1)                                                                                                                                                                                                                                                                
|(2)                                                                                                                                                                                                                                                                
|                                                                                                                                                                                                                                                                   
|                                                                                                                                                                                                                                                                   
|                                                                                                                                                                                                                                                                   
|Dated:  March 27, 2003                                                                                                                                                                                                                                             
|                                                                                                                                                                                                                                                                   
|                                                                                                                                                                                                                                                                   
|                                                                                                                                                                                                                                                                   
|                                                                                                                                                                                                                                                                   
|                                                                                                                                                                                                                                                                   
|                                                                                                                                                                                                                                                                   
|                                                                                                                                                                                                                                                                   
|                                                                                                                                                                                                                                                                   
|                                                                                                                                                                                                                                                                   
|                                                                                                                                                                                                                                                                   
|                                                                                                                                                                                                                                                                   
|                                                                                                                                                                                                                                                                   
|                                                                                                                                                                                                                                                                   
|A signed original of this written statement required by Section 906 has been provided to ESI Tractebel Acquisition Corp. and will be retained by ESI Tractebel Acquisition Corp. and furnished to the Securities and Exchange Commission or its staff upon request.