diff --git a/packer.py b/packer.py
new file mode 100644
index 0000000..6c0f42a
--- /dev/null
+++ b/packer.py
@@ -0,0 +1,112 @@
+
+class FilePath:
+    """
+    Tiny filepath class to hide blendfile.
+    """
+    __slots__ = (
+        "block",
+        "path",
+
+        # only for convenience
+        "basepath",
+        )
+
+    def __init__(self, block, path, basepath):
+        self.block = block
+        self.path = path
+
+        # a bit of overhead, but handy
+        self.basepath = basepath
+
+    # --------
+    # filepath
+    #
+    @property
+    def filepath(self):
+        return self.block[self.path]
+
+    @filepath.setter
+    def filepath(self, filepath):
+        self.block[self.path] = filepath
+
+    # ------------------------------------------------------------------------
+    # Main function to visit paths
+
+    @staticmethod
+    def visit_from_blend(filepath, access="rb", recursive=False):
+        import os
+
+        basedir = os.path.dirname(os.path.abspath(filepath))
+
+        import blendfile
+        blend = blendfile.open_blend(filepath, access)
+
+        for block in blend.find_blocks_from_code(b'IM'):
+            yield FilePath(block, b'name', basedir)
+
+        for block in blend.find_blocks_from_code(b'LI'):
+            yield FilePath(block, b'name', basedir)
+
+        for block in blend.find_blocks_from_code(b'ID'):
+            lib_id = block[b"lib"]
+            lib = blend.find_block_from_offset(lib_id)
+            # print(block.fields)
+            print(block)
+            print(lib)
+            # import IPython; IPython.embed()
+
+        blend.close()
+
+
+class utils:
+    # fake module
+    __slots__ = ()
+
+    @staticmethod
+    def abspath(path, start=None, library=None):
+        import os
+        if path.startswith(b"//"):
+            # if library:
+            #     start = os.path.dirname(abspath(library.filepath))
+            return os.path.join(start, path[2:])
+        return path
+
+
+def pack(blendfile_src, blendfile_dst):
+    import os
+    import shutil
+
+    dst_blend_tmp = blendfile_src + b"@"
+    shutil.copy(blendfile_src, dst_blend_tmp)
+    path_copy_ls = []
+
+    base_dir_src = os.path.dirname(blendfile_src)
+    base_dir_dst = os.path.dirname(blendfile_dst)
+
+    for fp in FilePath.visit_from_blend(dst_blend_tmp, access="r+b"):
+        # assume the path might be relative
+        path_rel = fp.filepath
+        path_base = path_rel.split(b"\\")[-1].split(b"/")[-1]
+        path_src = utils.abspath(path_rel, base_dir_src)
+        path_dst = os.path.join(base_dir_dst, path_base)
+
+        # rename in the blend
+        fp.filepath = b"//" + path_base
+
+        # add to copylist
+        path_copy_ls.append((path_src, path_dst))
+
+    shutil.move(dst_blend_tmp, blendfile_dst)
+
+    for src, dst in path_copy_ls:
+        if not os.path.exists(src):
+            print("  Source missing! %r" % src)
+        else:
+            print("  Copying %r -> %r" % (src, dst))
+            shutil.copy(src, dst)
+
+    print("  Written:", blendfile_dst)
+
+
+if __name__ == "__main__":
+    pack(b"/d/test/paths.blend", b"/d/test/out/paths.blend")