So I downloaded the Container Ride Save from resources but I don't know how to load it can someone tell me how?
Open console with shift + ` (or the little 2 on an azerty keyboard) then type "load containerridesave"
Don't hesitate to join the Portal 2 speedrun discord and ask your questions on #help : https://discordapp.com/invite/hRwE4Zr
but whenever i do that it says this 
"Can't load containerridesave file missing"
And yes I have downloaded it
You have to put containerridesave.sav into your SAVE folder (properties > browse local files > portal2 > SAVE > bunch of numbers unique to steam id > put the .sav file here.
After that, restart Portal 2, and type "load containerridesave" into the console once more.
Hope this helps.
I just have one more question how do you make the Livesplit timer start at 4 minutes when I load the save?
Livesplit -> rightclick -> edit splits -> fill in whatever the offset was at "start at"
From now on, for top 50 times, both partners must submit their demos. As such, it will also be required for to submit any .vpks that are used during the runs. If you have any questions, you can join our discord @ discord.gg/p2sr or you can create a forum post here.
The rules site has also gotten
