It's best to ask such questions on the seaside
mailing list.
Icons for WATree are currently not supported. You have to implement it
yourself. Subclass WATrree, add iconBlock or something like that.
I think the WATree that Pier is using supports icons, no? You just
have to enable them from the settings in the Web.
The WATree in Seaside is a port of the Tree in Pier, but without Pier
specific things such as icons. I think you can easily put back in the
support for icons, if you need.
Lukas
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Lukas Renggli
http://www.lukas-renggli.ch