placing plug ins

Hi

Can anyone tell me where i plae the help files now that I have downloaded them
Thanks

In windows: All

In windows:
All Script-fus/gradients/palettes/plug-ins/and many more things goes ot

Document and Settings -> YOUR USER -> .gimp-VERSION

In linux:
Show hidden files in home directory
.gimp-VERSION

cd ~/.gimp-2.4
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Some GIMP Tutorials