Exhibit 99.2

 Written Statement of the Executive Vice President and Chief Financial Officer
                  Pursuant to 18 U.S.C. Section 1350

Solely  for the  purposes  of  complying  with 18 U.S.C.  Section  1350,  I, the
undersigned  Executive  Vice  President and Chief  Financial  Officer of Alliant
Energy Corporation (the "Company"),  hereby certify, based on my knowledge, that
the Annual Report on Form 11-K for the Alliant Energy Corporation 401(k) Savings
Plan (the  "Plan") for the year ended  December  31, 2002 (the  "Report")  fully
complies with the  requirements of Section 13(a) of the Securities  Exchange Act
of 1934 and that  information  contained in the Report fairly  presents,  in all
material  respects,  the  financial  condition  and results of operations of the
Plan.

/s/ Thomas M. Walker
- --------------------
Thomas M. Walker
June 30, 2003

A signed  original of this written  statement  required by Section 906 has been
provided to the Company  and will be retained by the Company and  furnished  to
the Securities and Exchange Commission or its staff upon request.





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