As front shipping label you will need fields like name, surname, address.

the file which contains link to printable version is located in
[root]/packages/core_commerce/tools/order_print.php

and the package element which actually grabs all the order fields is located in

[root]/packages/core_commerce/elements/orders/detail.php

i recommend you to modify the second file (detail.php) to grab only data which you want, without additional divs etc (you can style it in html/css). Basicly you will have to remove uncesessary fields.

after modifications you must save this file and put a link to it (f.e. next to the "print order" button).

Let me know if this solve your problem