You may want to look at having your Excel file be a data connection for your IP form. Or better yet use SQL or SQL express on the backend and have your Excel use the data from there and have your IP form use the data from SQL too.
You can export from IP to Excel but some of the copy and paste I think is difficult. You may want to look at getting the data in SQL or evaluating if you really need Excel or could you do it all with an IP form and save alot of moving data back and forth.