Installing Rom with SDCard

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I trying to find how to install a new rom through sd-card.
If anyone can give me the link of a post explaining this or if anyone can explain i will be very pleased.

I copy a nk.nbf to SD Card. It's a Rom kitchened.
Other doubt is the version of the rom of my ppc. I have a Pw10B; ENG - 4.01.16 and in the kitchen the number is PW10A-ENG-4.01-700... How do i change this?

Copy the NK.nbf file to the SD card using your device and XDAtools ... go to the boot loader by soft reset while pressing power ... if it recognizes the ROM it will ask you to press action ... when flashing is done, press hard reset ... wait 60 sec and press hard reset again

Thanks for the information Biso007, but I have this ROM "OTP v7.7 Manilla 2D Biggy.nbh" and I just noticed that you wrote .nbf for the extension but you see this one has .nbh, and XDAtools does not recognize it and what I wanna know is it possible to install this one from the SD card, do I hav econvert it to .nbf or whatever supported by XDAtools? I have Herald or Wing still confused about it and one more thing I managed to install Hard_spl and after I installed Touch It Vista Cube, it is cool but I am trying to learn different ROMs and I am stuck with the one above. Do I need to Hard_spl again?

Edit: I figured out how to install from SD card, you copy the image (I think the name of the file is important) to the card, power down the device, start it up while pressing the camera button then it searches the card for appropriate file, if there is one it gives the warning to slide down the volume button to install.

plz mention full detail......i want to try this......what should be the name that will recognized by the dash........i'm stuck on tri-color(bootloader) mode...