You need to install custom recovery first then get root to install custom rom.
I think this article is no longer interesting because it has been too long. Samsung Galaxy Grand i9082 is Android smartphone that almost 3 years old from now. The complete specification you can find at GSMArena. When I am interested with custom rom, that must be done first are install custom recovery then continue with get Root Access from your Android smartphone.
First of all, install custom recovery.
That are widely used are ClockWorkMod (CWM) and TWRP.
First I try to install CWM. The general step is the same with other smartphone type.
Below the video tutorial.
[swf]https://www.youtube.com/watch?v=ZfeVedJiRPk, 420, 315[/swf]
I have follow the tutorial correctly even with release battery, but I always get fail. I don’t know why I get fail until I try to use TWRP. It’s work. Maybe if you get fail with CWM, you need to try TWRP.
If you need .img to tar.md5 format file, try to check this article.
Get Root Access
To get root access, you need to flash Super SU from costom recovery that newly installed. After reboot, you get the root access. Below the video.
[swf]https://www.youtube.com/watch?v=FEPoLJeY7Dg, 420, 315[/swf]
After the steps above, you can freely try and install custom rom and other.
Below are 2 samples of Galaxy Grand i9082 with custom rom.
Bliss Pop Lollipop Custom Rom on Galaxy Grand i9082
[swf]https://www.youtube.com/watch?v=noNmTm02Q-E, 550, 413[/swf]
AICP Custom Rom for I9082 Galaxy Grand
[swf]https://www.youtube.com/watch?v=Pg9KWr9jGos, 550, 413[/swf]