Wenli Zou
qcband@gmail.com
Keith's fitting method includes a huge number of fitting data, which are difficult to exactly reproduce in other programs because of copyright. However, the recent development version of the Multiwfn program 2.3.1 (and maybe the future versions) can combine WFN and ECP together. Gaussian09.B01 or higher revision is required to generate atomic EDF data for ECP. Please refer to the Multiwfn manual (Section 5.7) for details: http://multiwfn.codeplex.com/
Best regards,
Wenli