1) Leatrix Latency Fix -
This reduces your Latency (ping). More info on what it does and how to install is on that website.
2) Making APB:R Faster -
This is ment for slower PCs whos FPS is small and have lags
3) Removing the 60fps limit cap -
This is recommend for people with GOOD PCs only, basically it will allow your FPS to go higher than 60.
4) Spike/latency lag ingame - This may be caused due to Pando Media Booster that is installed with Gamerfirst Live.
All you have to do is uninstall Pando Media Booster and delete the Gamersfirst Live folder.
NB! Don't delete APB folder.