Installation
Double click on "900ss.oiv" and follow the on-screen instructions.
If you cannot open .oiv archive, right click on it, go to "Open with..." and select OpenIV program.

or

Go to menu Tools > Package Installer in OpenIV, open "900ss.oiv" and follow the on-screen instructions.

If something went wrong, please install manually.
1) Extract "900ss.oiv".(.oiv package is a zip archive. Use unzip software.)
2) Put "gosuke7mods" folder into "update\x64\".
3) Extract "dlclist.xml" with OpenIV from update\update.rpf\common\data
4) Add new line "dlcpacks:\gosuke7mods\" to "dlclist.xml"
5) Save, and replace the old one at update\update.rpf\common\data

Uninstallation
1) Double click on "uninstall_900ss.oiv" and follow the on-screen instructions.

Manual Uninstallation
1) Extract "dlclist.xml" with OpenIV from update\update.rpf\common\data
2) Delete this line "dlcpacks:\gosuke7mods\" to "dlclist.xml"
3) Save, and replace the old one at update\update.rpf\common\data
4) delete "gosuke7mods" folder from update\x64\


How to spawn the new added cars
I recommend you to use Enhanced Native Trainer or Simple Trainer, etc with "spawn car by name" function.
Select this function and input the vehicle name to spawn it.
Ingame vehicle names:

g_900ss

Troubleshooting
If you got game crash or no tuning parts in LSC, I recommend that you install gameconfig mod.
That mod will help you to solve problems.

known issues
no breakable glass
indicators does not work on custom parts
no breakable indicators and headlight on custom parts

Credits:
gosuke