since I have to make soo many blocks that are so similar, I usually open one and edit and save-as since all the attribute settings and layers are the same, usually I just have to adjust the size of the object, the text and the "item" attribute...
in 2005, I can edit it in the properties box even w/ constant, preset, invisable on......or I can double click the attribute and get the " edit attribute definition" box and edit that way as well.......