Hello,
Thank you for your post. The first thing you should make sure of is that the unit is clean before you install the cover. You can install the cover alone but it is easier to do with two people. You should pad any sharp edges on the unit or use a reinforcement kit on the cover. Make sure to utilize all straps and buckles and ensure that they are not over-tightened.
Here is a link to an instructional video which will show you how to install the cover. You must scroll down to the bottom of this page to view the video:
http://www.rvcoversdirect.com/products/adco/contour_fit_covers/Please let me know if you have any questions. I will be happy to help you!
Thanks,
Jessica
Covers Direct
1-866-626-8377
info@rvcoversdirect.com