[Galaxy S III Mini Android Development] Benzonat0r:
I have this in my build prop and they're working. Besides the tweaks are in the init.d folder so they're initialized automatically.

# begin build properties
# autogenerated by buildinfo.sh
ro.build.id=JZO54K
ro.build.display.id=BenzROM V4 JZO54K.I8190XXAMA3
ro.build.version.incremental=I8190XXAMA3
ro.build.version.sdk=16
ro.build.version.codename=REL
ro.build.version.release=4.1.2
ro.build.date=Sat Jan 19 15:56:10 KST 2013
ro.build.date.utc=1358578570
ro.build.type=user
ro.build.user=dpi
ro.build.host=DELL180
ro.build.tags=release-keys
ro.build.changelist=860525
ro.product.model=GT-I8190
ro.product.brand=samsung
ro.product.name=goldenxx
ro.product.device=golden
ro.product.board=DB8520H
ro.product.cpu.abi=armeabi-v7a
# Samsung Specific Properties
ro.build.PDA=I8190XXAMA3
ro.product.cpu.abi2=armeabi
ro.product_ship=true
ro.product.manufacturer=samsung
ro.product.locale.language=en
ro.product.locale.region=GB
ro.wifi.channels=
ro.board.platform=montblanc
# ro.build.product is obsolete; use ro.product.device
ro.build.product=golden
# Do not try to parse ro.build.description or .fingerprint
ro.build.description=goldenxx-user 4.1.2 JZO54K I8190XXAMA3 release-keys
ro.build.fingerprint=samsung/goldenxx/golden:4.1.2/JZO54K/I8190XXAMA3:user/release-keys
ro.build.characteristics=default
# end build properties
#
# system.prop for U8500
#
rild.libpath=/system/lib/libsec-ril.so
rild.libargs=-d /dev/ttyS0

# Graphics related configurations
ro.sf.lcd_density=240
ro.sf.display_rotation=0

# System property for Default Brightness
ro.lcd_brightness=170
ro.lcd_min_brightness=30

# The OpenGL ES API level that is natively supported by this device.
# This is a 16.16 fixed point number
ro.opengles.version=131072

# Enable RecoverySystem to emit "factory-reset" reset string
# instead of "recovery" when doing a factory reset. This is
# useful when implementing factory reset without the entire
# recovery framework.
ro.factoryresetwithoutrecovery=true

# debug.sf.hw=0 Use b2r2 as compositor in SurfaceFlinger
# debug.sf.hw=1 Use Mali as compositor in SurfaceFlinger
debug.sf.hw=1

# Android defaults EGL preserved swap behaviour
# This gives bad performace for deferred renderers
# such as Mali.
debug.hwui.render_dirty_regions=false

# STE: Low power audio - enable ULP mode
ste.nmf.autoidle=1

# STE: Address of DBus STE bus
ste.dbus.bus.address=unix:path=/dev/socket/dbus_ste

# STE: UNSOL_CALL_RING is only sent once from RIL.
# Android needs to generate more rings if needed.
ro.telephony.call_ring.multiple=false

# STE: Hardware video codecs configuration
ste.video.dec.mpeg4.in.size=8192
ste.video.enc.out.buffercnt=5
ste.video.dec.recycle.delay=1

#STE: Fast Dormancy Flag
# Fast Dormancy based on USB Tether Events and Screen States
ste.special_fast_dormancy=false

# STE: camera orientation front & back
ste.cam.front.orientation=270
ste.cam.back.orientation=90

# STE: Camera file path configuration
ste.cam.ext.cfg.path.secondary=/system/usr/share/camera/config_file/aptina_mt9v113.dat
# STE: Default trace configuration
ste.omx.ctx=0

net.streaming.rtsp.uaprof=http://wap.samsungmobile.com/uaprof/

persist.fuse_sdcard=true

#
# system prop for issue regarding writable directories(SDT)
#
ro.kernel.qemu=0

# system prop for FM Radio SNR
#
service.brcm.fm.start_snr=41
service.brcm.fm.stop_snr=20

#
# ADDITIONAL_BUILD_PROPERTIES
#
ro.com.google.clientidbase=android-samsung
ro.sf.lcd_density=240
dalvik.vm.heapstartsize=8m
dalvik.vm.heapgrowthlimit=64m
dalvik.vm.heapsize=256m
wifi.interface=wlan0
wifi.supplicant_scan_interval=15
ro.sec.fle.encryption=true
ro.error.receiver.default=com.samsung.receiver.error
ro.config.ringtone=Over_the_horizon.ogg
ro.config.notification_sound=S_Whistle.ogg
ro.config.alarm_alert=Walk_in_the_forest.ogg
keyguard.no_require_sim=true
ro.com.android.dateformat=MM-dd-yyyy
ro.carrier=unknown
ro.ril.hsxpa=1
ro.ril.gprsclass=10
ro.adb.qemud=1
ro.com.google.gmsversion=4.1_r4
net.bt.name=Android
dalvik.vm.stack-trace-file=/data/anr/traces.txt

logcat.live=disable
ro.config.nocheckin=1
persist.sys.use_dithering=0
persist.sys.ui.hw=1
debug.performance.tuning=1
debug.egl.hw=1
debug.composition.type=gpu
ro.config.disable.hw_accel=false
ro.max.fling_velocity=12000
ro.min.fling_velocity=8000
profiler.force_disable_err_rpt=1
profiler.force_disable_ulog=1
pm.sleep_mode=1
ro.ril.disable.power.collapse=1
video.accelerate.hw=1
persist.sys.scrollingcache=0
debug.performance.tuning=1
debug.qctwa.statusbar=1
debug.qctwa.preservebuf=1
windowsmgr.max_events_per_sec=300
ro.telephony.call_ring.delay=0
ro.config.hw_power_saving=true
ro.media.enc.jpeg.quality=100
ro.media.dec.jpeg.memcap=8000000
ro.media.enc.hprof.vid.bps=8000000
ro.media.panorama.defres=3264x1840
ro.media.panorama.frameres=1280x720
ro.camcorder.videoModes=true
ro.media.enc.hprof.vid.fps=30
net.ppp0.dns1=8.8.8.8
net.ppp0.dns2=8.8.4.4
net.dns1=8.8.8.8
net.dns2=8.8.4.4

#PowerSaver Tweaks
usb_wakeup=enable
proximity_incall=enable
power_supply.wakeup=enable
ro.config.hw_power_saving=1
ro.config.hw_fast_dormancy=1
ro.config.hw_quickpoweron=true
persist.sys.use_dithering=0
#
#Xloud Engine Service
nro.semc.sound_effects_enabled=true
nro.semc.xloud.supported=true
npersist.service.xloud.enable=1
#
#Bravia Engine Service
ro.service.swiqi.supported=true
persist.service.swiqi.enable=1
#
# Signal Tweaks
ro.ril.hsdpa.category=8
ro.ril.hsupa.category=6
persist.cust.tel.eons=1
#
#Support for ipv4 and ipv6
persist.telephony.support.ipv6=1
persist.telephony.support.ipv4=1
#
#Enable Dual Transfer Mode
ro.ril.enable.dtm=1
#
#Increase overall touch responsiveness
windowsmgr.max_events_per_sec=90
#
#Faster Scrolling
ro.max.fling_velocity=12000
ro.min.fling_velocity=8000
#
#Touch tunning
touch.presure.scale=0.001
#
#For sensor sleep control
ro.ril.sensor.sleep.control=1
#
#Improve overall media quality
ro.media.enc.jpeg.quality=100
ro.media.dec.jpeg.memcap=8000000
ro.media.enc.hprof.vid.bps=8000000
#
#Dialing Tweaks
ro.telephony.call_ring.delay=0
ro.lge.proximity.delay=25
mot.proximity.delay=25

I'm still testing my V4 ROM and all seems to be working. But listen, in order to get those scripts working commands have to be written in the kernel for init.d, and once you decompile it it's gonna say custom. in the settings and download mode.