Question : when moving files(pdf mp3 etc.) from Mac OS X 10.6 to NTFS'ed UBS Stick then to Win XP, hidden files appear

when moving files(pdf mp3 etc.) from Mac OS X 10.6 to NTFS'ed UBS Stick then to Win XP, hidden files appear.: like ._filename1.pdf  ._file.doc etc...
how can I diable them being moved?

PS: I select the files under Mac OS X normally using Cmd-A(select all).

Answer : when moving files(pdf mp3 etc.) from Mac OS X 10.6 to NTFS'ed UBS Stick then to Win XP, hidden files appear

Those hidden files contain information a Mac uses to determine which application to use to open files. If the files are to be used only in Windows, they can safely be deleted.

http://serverfault.com/questions/15044/preventing-mac-os-x-clients-from-polluting-windows-shares-with-resource-forks

http://www.macosxhints.com/article.php?story=20060623171530952