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@secretman7 Alright sweet I haven't given it a go yet, but i'll add you on Skype just in case something goes wrong when I try to mod it again if that's cool.

@secretman7 Thank you for the tips i'm going to give it another go.

Someone be a legend and make a video explaining how to combine add-on cars with tuning. I know this file works i'm just too much of an idiot to understand whats not going right. If anyone can help me on Skype let me know!

@Reyser
I just started over with 2 different vehicle add-ons and now my game won't even start. I think i'm gonna give up on this, been trying for two days now makes no sense. Back to playing with 10 add-on cars, RIP. Would be nice to have a video tutorial on how to create 1 big dlcpack since there is zero information online on how to do it successfully.

@Reyser
I changed <id value="918" /> to
<id value="982"/>
and <Item>918_918_modkit</Item> to
<Item>982_918_modkit</Item> and I tried a few other suggestions you listed but when I spawn in the Porsche 918 Spyder i'm still limited to lights,plate and wheels only.

@Reyser
I've been changing the ID's and still haven't seen anymore modifications in-game besides lights and some other parts. Are the id's randomized for everyone or is there a list or something I can use because if it's taking this long to get one car working then i'll never be able to make a big car pack.

@Reyser
Okay and for every car I add in the future I have to just keep changing their ID's until tuning and lights work?

@Reyser
Okay and just to clarify so I know i'm changing the right string. In "carcols.meta" I'm changing
<kitName>918_918_modkit</kitName>
<id value="918" />
&
<Lights>
<Item>
<id value="918" />
To a different number.
And in "carvariations.meta" i'm changing...
<kits>
<Item>918_918_modkit</Item>
To a different number
Example: <Item>1076_918_modkit</Item>

@Reyser
Is there any way to know what id to use i've changed it over 15+ times now and still nothing is appearing.

@Reyser
Okay and how do I know what strings to change in the "carcols.meta" and "carvariations.meta"?
In "carcols.meta" do I just search id value and replace and then in "carvariations.meta" do I just change the modkit string like you explained previously. Also can I change it to any number or is there a number limit?