Not sure if this has been posted and if so, sorry to duplicate it.
There is an option since at least AutoCAD 2006 to where you can just select objects however you choose and then copy them, move them, and paste them as a block just by simply doing the following
Select all the items you want
If you want to move or copy it only, just right click anywhere and drag it on the screen, then release it, then the menu pops up asking if you want to move copy or paste as block.
One added feature if you want to paste as a block, wherever you right click becomes the blocks base point, so I recommend using a grip in a location that could be useful if your going to paste as a block.