html and indenting

Hi, I see no general forum for users in English so I write here. Thanks for good job you are doing (I mean xemacs) I have the following problems: 1) how do I change default indenting in psgml-html mode. I cannot trace it down. 2) how do I enable html indenting/highlighting for other filetypes (*.mytype) and eventually slightly customize it (add 1-2 additional keywords etc.) 3) I have installed html-helper-mode from http://www.gest.unipd.it/~saint/hth.html. It works just fine with my emacs 21.1.1. However when I try to run it with xemacs (XEmacs 21.4 (patch 4), which came with my suse8) I get an error: file mode specification error: (void variable html-tagface). I am not familar enough with lisp/xemacs to handle that please advice/help me thanks a lot! dominique