I've got 4 3750's stacked and running IPBase IOS w/o Crypto. I want to upgrade these to an image that supports crypto. In the instructions it says to use a command similar to this: archive download-sw /leave-old-sw /reload tftp://host/c3750-ipbasek9-mz.122-25.SEB4.tar. However, I can only download the .bin file, should I use a different method for upgrading, or is the bin file sufficient? If I need to do this another way, will the other method push the image to the other three switches?