The art of transporting a scanner on a bicycle

As you may or may not know, I have recently moved to another town to go to the university. I have a nice place to live, which is about 5 miles away from the uni. This is not really a problem, it means I get buffs bicycling there every day.
Near my university is a nice (and cheap!) computer store. Remebering having promised to produce pictures of myself, I decided that I could justify getting a scanner. I got the HP 4370.
Now, had I been smart, I had simply taken the bus that morning. Or I had brought a large bag. Or I had asked for a large bag at the store. I wasn't smart.
Now, unlike other products, the 4370 comes in a casing without a nifty plastic handle. It has two holes in the top instead. Not a bad idea really, it works well when transporting it to a car, to a bus, to a boat, or to an alien spacecraft. It even works very well when transporting it -in- all of the above. It does not, however, function well in combination with a bike.
Why? Well, since the handle is part of the box, and thus made of cardboard, it isn't very sturdy. So, when slowly biking from the store, I watched (with increasing concern) the handle slowly getting torn. It gave up, 4 miles from home. Now, the size of box, and the size of my bikes luggage carrier have very interresting proportions. No matter how they're turned, it's impossible to get them to fit in such a way that the box is reasonably safely fastened on the lugagge carrier. With one hand on the box and another on the box, I started walking. A mile later I decided to open the box. Perhaps the scanner could fit in my bagpack? 15 minutes of intense study of both, I discovered that it could not. Now I had an open box, instead of a close one. This did not make things any easier. A mile later, I reached a store. This store is generally a good store. It has most of the stuff I need, to a fair price. Well, actually that's not true. Two items in this store are heavily overpriced. Tripple twist twine, and scissors. I needed both.
As it turns out, the lugagge carrier could carry the box if you applied enough twine to make both look like a ball of yarn. I finally made my way home. It had only taken my 4 times longer than usual.

Moral: Don't try to transport an HP Scanjet 4370 on a bike.....ever.