Question [HELP]How can i mount or edit /dev/block/mmcblk0p16

Hi all
I have a huawei acsend p1 u9200 mobile phone
it comes our country with a gsm operator and it is default locked
i unlocked it and using custom roms...

but i have one problem.
the gsm operator located their own splash logo (boot logo) in the device.
i looked phone's fstab and saw that splash partition is /dev/block/mmcblk0p16
how can i modify it?

i used

fastboot flash splash splash.img
fastboot flash splash logo.bin

etc

i prepaired the logo with gimp as bmp
first i tried nbimg's convert tool for linux
after i tried to save as bmp 24 bit and ffmpeg to convert

it doesnt matter if anyone gives me another logo with resolution 540x960
i dont want to see gsm operator logo
it can be android logo or google logo

thanks.