WKGR='10.6.8_x86_xnu_stage_01'
TARS='
http://www.opensource.apple.com/tarballs/dtrace/dtrace-78.tar.gz
'
[ -d "$WKGR" ] || mkdir "$WKGR"	;
(cd "$WKGR"	&&
for f in $TARS; do
  curl -RO -C - "$f"
done
)