HOW TO REMOVE YELLOW TRIANGLE
(1) Flash netchip's kernel, to obtain root.
(2) Make sure you have the netchips kernel in zImage. (ZIP --> extract --> TAR --> extract --> zImage).
(3) Push the zImage file to /sdcard . It must still be called zImage !
(4) Install The CWM app --->
http://db.tt/psc0JdvG
(5) Reboot into download mode (adb reboot download, or boot the device with home and volume-down pressed)
(6) Fire up ODIN, and flash the Samsung kernel from the above post
(7) Boot the device with the stock kernel. CWM Manager will still be available.
(8) Start CWM Manager, select Flash Kernel, and select the zImage from netchip you previously put on your SD-card. The kernel will flash and the device will reboot.
(9) You will now notice you no longer have the warning triangle during boot, but you are actually running netchips kernel.
(10) In the future, if you only use the Flash Kernel option inside CWM Manager instead of ODIN, the triangle will not return, neither will your flash counter increase. But keep in mind, that CWM Manager can only handle a direct "zImage" if you are NOT running a kernel with full busybox support (this is currently needed for flashing kernels out of .TAR and .ZIP files)
You may also leave the stock Samsung kernel installed and you will still be rooted, however no clockwork recovery. If you want to leave the stock kernel installed SKIP STEPS 2,3,4,5.
Credits to Chainfire for the write up! Since I know people are lazy and wont search for it.