[pstricks] pst-tree: framing subtrees

[Alexander Bergolth]

Hi!

Chapter 44 of pstricks-doc.pdf introduces \pstreeframe and \pstreecurve.
However, these macros don't seem to ba available in my pst-tree version
(97 patch 6). I couldn't find them in the current version on CTAN
either. :( The only reference I found is an old mail that unfortunately
contains a broken URL:
http://tug.org/mailman/htdig/pstricks/1998/000242.html

Is there another way to frame subtrees?

Thanks,
--leo
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