IE-->Tools-->Internet Options-->Programs Tab ?
Try reinstalling IE 6 (remove at Add/Remove Programs>Windows Components then add back), or repair IE, and see whether IE can now reconize the new program (MS Office XP).
I am running a P4- 1.6, 256 ram, 93 GHD, 56k dialup, Win Xp Pro. In attempting to change my HTML editor, the drop down window gave me no choices. Note pad was it. After installing Office XP, I went to change the options in HTML editor and I still had no choices other than note pad. My other computer, set up the same way gives me the options of, Microsoft word, excel, frontpage and notepad. Any suggestions as to what I am missing here? Thanks, Bill