Quite simply, actually! One of our customers from 2012 made a short tutorial here.
For the IKEA Kramfors (Leather Version), you'll have to do the following:
1. You'll just need to detach the metal leg frame
2. Slip the covers over the sofa
3. Tuck the excess fabric under the base
4. Finally secure it using the metal leg frame by re-attaching them to the sofa.
For the Standard fabric version Kramfors, it'll just be the same as your original but if you're still unsure you can definitely e-mail us and one of our Agents will guide you through.