inguni

Copy the folder "vehicles" (The folder, not just the files) with all the sounds (From where you have been downloaded the sounds) and then go to the folder that you have selected in the step of extracting from OpenIV and paste the folder.It will say that if u like to replace all the files (around 300 if I didn't remember wrong). Sorry if I expressed my self wrong, I think that if you search "Not supported format version, actual: "10" but expected "11"." on google, you will find an explanation with better translation than mine :P.
Or you can just go to this thread: 

They have the same issue and someone resolved it.
I'm really sorry for my english.

Hi TrisBreezy, first of all sorry for my english, I'll try to do my best.
If you like to import a oac file with OpenIV 2.7 u still can. The only think is that the encrypt system was changed. To do it, first u need to export the vehicles.awc to openFormats (Right click above vehicles.awc - Export to openFormats (.aoc).
When you select a folder, it will decompress the vehicles.aoc and the folder with the sounds inside. You only need to overwrite your folder with the sounds, and import it like always. (The new vehicles.aoc will have the proper format and it'll allow you).
 
Now, if you don't have the vehicles.awc... then I don't know if you can decompress another one like movement.awc and change the name when is decompressed to vehicles.oac... I didn't try it.
 
Again, sorry for my english, if u need more info just tell me. 

You make it sound like we've had people waiting for years on end.  This couldn't be further from the truth.   GTA V was released in April 2015, with the first version of LSPDFR being released less than two months later.  Not only that, but we followed up with a second major update less than a month after 0.1, despite the challenges we faced from the aggressive updating of the game, including the one update which attempted to stop modding altogether.  We first announced 0.3 towards the end of September and that's not even three months ago.  Maybe we made a mistake in announcing it this early, maybe we should've held off and announced it towards the end of this month instead?  That probably would've been the smart thing to do, it'd be the sort of thing that a proper publisher like EA or Activision would do.  The key thing though is that we are not a proper games publisher.  We're not a company, and I like to make an effort to actually listen to what the people who enjoy our work say.  The one clear message that we heard over and over again was that regular updates would nice.  People wanted to know what was happening as it happened, not two months after.  By announcing 0.3, and by posting regular updates on it, we have given what we were asked to give.
Can I now ask that in return, people can refrain from posting such poorly thought out comments on how we've failed them?  I'd much rather spend the very, very limited amount of free time that I have on developing this project that I love just as much as anybody else here.
Let me just reiterate, we're not a games company.  We're a group of people who purely by chance came together to develop what you now know as LCPDFR and LSPDFR.  If there's anything in the world I could wish for, it'd be that we were indeed a games company and that we did have the ability to dedicate massive resources and time into making the best game this genre has ever seen.  There's absolutely nothing that I'd love more than to be able to develop LSPDFR every day and get paid a full-time salary for it, nothing.
When we failed to meet that release date, despite the fact that the modification is free, despite the fact that none of us had any obligations to anybody, and despite the fact that we had given our best effort, I very publicly apologised.  Not only was this disappointing to everyone here, it was also something that really affected me - there's nothing worse than letting down thousands of people like that.  I want to make sure that we don't let anyone down like this again, and therefore we've not given a release date since.  There's also a whole number of practical reasons for this - for example the fact that mod-breaking updates can happen to the game at any point.
Yup.

We all hope! Especially my F5 key :P
But the time they spend providing news is time they will not spend actually working on LSPDFR, so too much news is too much I guess :)