How to restore the "Linked" attribute of a picture to "false"?

Question

Just after importing a picture, the "linked" attribute of the
picture member is "false". When distributed, the data of picture is
packed in the DCR file.
If some lingo code changed the "filename" of the member,
like follow:
member("MyPicMember").filename = ".\NewPicture.jpg"
The content of the picture would be changed. And as a
result, the "linked" attribute of the member would be changed to
"true" at the same time. A triangle appears on top right conner of
the icon of the picture member. If distributed again at this time,
the data of picture is not packed in DCR file. Picture file must
exist beside the DCR.
Now I want to restore the "linked" to "false" (because I
want to write new projects based on the old, I want to let the
picture data in the DCR again). I found it is difficult to restore
it. The "linked" attribute can not be modified, whether in Property
Inspector or in code. I found the only method is delete the member
and import again, manually, one by one. But there are many pictures
in my program, so it makes me tired.
Anyone tell me a good method to restore them? I hope it can
use code to do it.

Answer 1

put the following handler in a movie script:
on mUnlinkBitmaps
cl = the activecastlib
sel = the selection of castlib cl
anz = sel.count
repeat with n = 1 to anz
repeat with m = sel[n][1] to sel[n][2]
memref = member(m, cl)
if memref.type = #bitmap then
fname = memref.filename
if fname.length then
memref.importfileinto(fname, [#trimwhitespace:0])
put "imported:"&&memref
end if
end if
end repeat
end repeat
end
select the members you want to import (or "select all" to
import all linked bitmaps) and type
mUnlinkBitmaps
into the message window and press return.
you can also take a look at my handlermenu tool:
http://www.farbflash.de/cgi-bin/blosxom.cgi/Dokumente/Director/Tools/handlermenu.html
which has this among other authoring utilities in the
utilities menu.