How do I customize the backpath?

The backpath macro cannot be customized for version prior to the November 27th, 2000 Build of WebX 4.0 (otherwise see %% macro backpath %% in standard.tpl), but you can develop a separate macro. Here's an example macro:

%% macro SteppedBackpath %%
<br>
<table valign=center width=70% border=0 cellpadding=8 cellspacing=8>
<tr><td bgcolor="#CCCC99">
<b><a href="%%siteUrl%%"> <img src="%%siteImages%%/site.gif" %%nop%%
    border=0>%%siteTitle%%</a>
%% if parentTitle 1%%
    <ul><a href="%%parentUrl 1%%"> <img src="%%siteImages%%/site.gif"
    border=0>%%parentTitle 1%%</a>
%% endif %%
%% if parentTitle 2 %%
    <ul><a href="%% parentUrl 2%%"> <img src="%%siteImages%%/site.gif"
    border=0>%% parentTitle 2 %%</a>
%% endif %%
%% if parentTitle 3 %%
    <ul><a href="%% parentUrl 3%%"> <img src="%%siteImages%%/site.gif"
    border=0>%% parentTitle 3%%</a>
%% endif %%
<ul>%%pathicon%% %% pathTitle %%</ul>
%% if parentTitle 3%%</ul>%% endif %%
%% if parentTitle 2%%</ul>%% endif %%
</b>
</td></tr>
</table>
 
<ul>
%% endmacro %%