I would recommend you to use the Product Knowledge Template workbench. Open the assembly/part and all drawings and use the "Create a Document Template" feature and tie in all the drawings as external documents. If you want to make it easy to access store it in catalog and from the catalog publish the template, then you can reach it from tools/customize in the commands tab, choose catalogs in the categories field and you have command that you can place in a toolbar to quickly access the template. (this also work for power copies and udf's)
In short this would give you an assembly/part template with the same behavior as a file new from with drawings tied to it.
There may be other ways but I can't of one right now, so please chip in, I'm interested if there are other ways without the PKT workbench.