Intructions? Does anyone have any idea how to attach the shampooer to the vaccum?

Yes indeed the processes is very simple.

You're going to take the front end off like you normally would, but you also need to detach the bag so you will then grip on to the handle under the mini emptor, that's the plastic thing is connected to, there is a grip under that you will grip and turn it towards you.

Once it's loose you will then fill the shampoo tank. The solution calls for one shampoo tank cap full of Kirby suds to one part of water, and you can find the water parts labeled on the side of the tank. Use ONLY Kirby suds, I've tried other brands of suds and they didn't dry as fast as Kirby does and Kirby smells better anyway.

Second you want to put the tank on the exhaust port of the Kirby where you took the bag off. You will see there are little buds on the port mouth and there are grooves on where the shampooer tank attaches to the port mouth, line the bud up with the grooves on the tank and push towards the handle.

Next you're gonna hook up the shampoo tray like you would the beater bar. Next you're going to hook up the shampooer hose and you will put the smooth end on the small port on the tank and the other end on the hole in the middle of the tray.

Then you should be ready to go all you do then is turn the vacuum on without the suds on, and put it all the way down. Then you turn the suds on full blast and put the vac in drive and go. Not too fast but not too slow either just go a bit slower then when you vacuum on back and forth strokes. Well, hope full this solves your problem!