what he want exactly in my words,
select all the blocks in the drawing,
the present position of the block should be there only. but when you see the insertion point it should be at 0,0.
for this what we can do is go to eachblock,
take the data of block(means name, rotation,layer etc..)
explode that and make that wblock again but the insertion point you have to give is 0,0.
and insert again.
if you guys got confused about this try manually do all these things first. ok..