Adding subdirectories to load-path?

Hi,

for said 'xemacs-packages' package, I would like to re-compile patched 
elisp files. In the bootstrap case, I only have XEmacs installed, and 
it looks like I need to add the .../lib/xemacs/xemacs-packages/lisp/*/ 
subdirectories to load-path.

Is there an XEmacs equivalent to the GNU Emacs 
"normal-top-level-add-subdirs-to-load-path" function (see 
<http://emacswiki.org/emacs/LoadPath>)?

Cheerio,
hauke

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