Cleaning up .svn directories

Hi,

Is there a mean to clean up .svn directories in all subdirectories of
a checked out directory ?
Because I'm having trouble with impossible commit and I have to do a
fresh checkout but when I try to overwrite my fresh checkout with my
modified files, it overwrites .svn elements too so I can't commit.

Thx in advance

-- 
Sebastien ARBOGAST
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