Help with road mods backup

[Wajeeh]

Hey, i have recently downloaded a road mod which comes with an auto installer (see the installer and 2 files)

Spoiler: show

My game is running fine, so i want to make a backup of it first before proceeding with the auto-installer (in case it makes me lag or i might wanna switch back to the original map).
So what files do i need to make the backup of (copying them in a different folder)?

[BeaTen.]

Just make a copy of your current gta3.img file and if anything goes wrong just replace it

[Wajeeh]

Alright thanks!