[Zope] Changing index_html method from anoter method

Hi, This quite the same question than my last one but I may have not been clear...: I want to change the code of my index_html method from another method. I tried with manage_upload... I didn't manage, as I think there is a permission problem (even If I changed the proxy) I tried directly with index_html.raw, I didn't manage I though that a function write_raw() was existing, I didn't find... Do u know how can I do such a thing? Isn't possible to make something like <dtml-var "index_html.raw = new_index_html">... Thanks..... Pierre