so apparently you can access eg. blocks from other drawings through the content window (have to add a dwg and specify this as containing blocks)
but, did you find out how to then have autocad redefine the block in this drawing by the one from the content-window????
that is the feature from the designcenter i almost always use!!!!
what we used to do before switching to the workflow with the designcenter was, wblock from a drawing and inserting this block into the other drawing, that way the block gets redefined too, this just creates a lot of "help"files or blocks and is a bit more timeconsuming than the designcenter