lg l3 e400 :i need help in merge system memory 157 with the internal memory 1000

Hi partnaer:
I need help with this problem, I want increase the size of the memory in the device LG L3 E400
system memory 157+internal memory1000=1024mb
Through the merge system memory with the internal memory
I own the following system :
software version
V10H
build number
GRK39F
android version
2.3.6 orginal rom
earlier i use many systems and was beautiful, but does not support Arabic languages
for example :

LGE400V10sSDMergE
gellmar_StockMerge400_rc2
v10k