Installing a new rom to my tablet

ofcourse

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Jan 17, 2014
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I want to install a new rom to my android tablet.There are necessary instructions and files.One of the files are rockchip batch tool v1.5 and other is a disc image file named rom.

It says

1- load the drivers
2-select the img file (rom) in batch tool
3-install it to device by clicking restore.

Is this enough or should i delete the rom that is already loaded in my tablet.Like when we format the old OS in computers?

My tablet uses android 4.1.1

Thanks in advance.