Don't use this, see latest update here
Also use the iPod-tree
fix (unzip & upload contents to formatted iPod)
No longer required with latest update
This should fix the freeze-up issues.
So you should now be able to upload your music back to ipod using winamp/ml.
(was required fix for version of plugin attached below only)
note: these edits were inserted AFTER all the comments below.
[EDIT: December 2003]
Still hanging? See HERE
Nullsoft ipod_plugin (Aug 2003) attached here: