Forget pasting Excel sheets. A 3rd party application called AutoXLS allows you to create, edit and insert Excel tables into AutoCAD and it looks exactly like AutoCAD geometry and text. In fact it creates an editable block that references an Excel file or you can delete the Excel file and it will create a temp file when you edit the table. The company is at CADADDON.com . There is other 3rd party software too but this is a pretty good one. No, I don't work for the company. I dislike creating tables in AutoCAD and this has saved me loads of time.