First of all, a very good mod and I really enjoy it.
However, I have found a few flaws playing this update since it came out.
First, the game is not very difficult. I normally play the expert difficulty with a mid table team like Force India and struggle to score points. But, after the update, I could easily qualify in the top three, just tenths behind the pole-sitter. In the race it only took a couple of laps before I was in the lead of the race. When I tried to figure out why the AI suddenly dropped in performance, I noticed that the overshot a lot of the corners and broke way to late, often missing their braking point. This made them lose a lot of time. If I was to guess, maybe this happens because of the increase of power to the cars.
Secondly, the different teams often finish in unrealistic position. Most notably, the Manors often get to Q2, and the mclarens often finish races in top 5. The Ferraris seem to outperform the Mercedes. I dont think this is a huge issue, and again, if I were to guess, I think it is the increase of power that causes this issue (for example, the Manors are fast in a straight line and gains massively in the game because of the increase of power). I have to mention that I run the game with the realistic damage mod as well, but I have driven quite a lot of races in career mode, so I dont think it is the realistic damage mod that causes this. Finally, some names in the e-mails in career mode are still the names from 2013, not a big issue of course and when the mechanic speaks under the race, he often uses names from 2013 (for example Paul di Resta instead of Max Veerstappen). I do not know if you can fix this (maybe use soundfiles from newer games, but again, not a big issue.
There are the issues I have found with this amazing mod during the months that I have player it for. I am a huge fan of the SKYFALL mod and I hope you will continue working on it untill f1 2016 comes out.
Thank You Skyfall
The only advice I can give you is to check that you download version 1.4 (or latest version) and follow the correct file installation. Check that your F1-2013 game copy is working.
There is a very good "How To" Guide created by Graham Laing.
I hope that it helps you clarify any doubts. Follow this link:
http://www.racedepartment.com/threads/how-to-install-a-mod.73614/
Remember to BACK-UP your game install (The guide will also show you how), and remember to always use a original game install.
Regards, SKYFALL.