Hi Dottie
Briefly this is the procedure.
1. The unit comprises an aerial and a box containing the router, these are connected with an ethernet cable.
2. You stick the aerial on the window (or wherever) with a sucker and plug the power cable in to a 12v socket.
3. Leave to settle down for a minute or two
4. On your device, go to settings > wifi and select the iBoost. Type in the password written on the side of the router.
5. On your browser type in
http://10.20.30.40
6. A window should open up with user/password, type mhw in both places
7. An interface window opens
8. Click on the wireless tab
9. You click one of the options (can't remember which) and a window will open showing all the wifi access points detected
10. Look for one with no encryption ("open"), or the one you have a password for
11. If you find no suitable point, rotate the aerial 90 degrees and click the "Scan" button
12. Repeat the rotation 90 degrees each time until you find a suitable access point
13. When you find one, click "select", then "change", then "apply" and wait for the router to reboot
14. Hopefully then you will be connected to your access point
15. You can optimise the signal using LED's on the aerial, or using the web interface
Hope that is clear, it's not as complicated as it sounds and the instructions that come with it are good. Their support is also quick and helpful and you can practice at home on your own wifi.