Default [Q] Hi guys ~i need a help~about port a rom to an unsupported device from souce code

Hi guys ~i need a help~about port a rom to an unsupported device from souce code.I got bought a device running android 4.1~it is a tab~made in malaysia~a malaysia brand ~not a big brand like samsung,htc and sony(so that havnt any rom information online)~i aready flash a cwm port by myself~but the tab"s android operating system is very lag~i need a help in XDA ~I need you guys help me to port a smooth rom in it please~

thanks you all~and sorry for my broken english
here is my Tab"s information

Model = Xpringsurf G8D
Operating System=Android 4.1.2

THE HARDWARE IS.
CPU=MT8377(Cortex A9)
CPU MODEL=ARMv7 Processor rev 0 (v7l)
CPU CORE=Dua Core
CPU SPEED=1209MZH
RAM=(498/969MB)DDR3
ROM=(675/1008MB)
Internal Storage=8G SD=(ADD BY MYSELF)(8G~16G)up to 32G
GPU SURPPORTER=Imagination Technologies
GPU=PowerVR SGX 531
GPU VERTION(OPENGL)=OpenGL ES-CM1.1
Display=8 INCH IPS PANEL
Image Pixel=160DPI
Support Multi Touch
Resolution=1024X768 Pixels
Wireless Connectivity=Support 3G/BLUETHOOTH/GPS
Front Camera=0.3MP
Rear Camera=2.0MP(192)
Playback Time=Web Browsing:4.5 hours/video:4.5 hours/eBook:6hours/Music:10 Hours/Standby:7 days
Dimension=200.5 x 151.4x10.3mm Weight= 400g

hi guys here is the original firmware XPRINGSULF FIRMWARE.txt

thanks you all~and sorry for my broken english

my email=kissme08105@gmail.com