I am looking for a way to combine multiple drawings into a single drawing in one step...

I can use Insert>Insert Block to browse for the file and click OK... Unfortunately, this doesn't work if the number of files I need to combine is larger.  The same can be said about XREF or XATTACH.  The fortunate part is that all the files share the same origin (no overlapping geometries) and scale.

Any suggestions on how I can do this?  

Thanks