Im running a hackintosh on snow leopard 10.6.3 and everything on it is running and working perfectly. When i first installed it i installed my drivers and stuff and everything worked well except for the sound which i finally got working i had to install something for a realtek driver and finally got everything working. So i hackintoshed my computer with the Tonymacx86 method and when i finished i used multibeast to install the nvidia drivers and sound and other stuff. Now the reason i want to upgrade to 10.6.4 is because i want to be able to use the latest version of flash player and latest version of safari and other stuff too. I dont wanna upgrade to 10.6.6 because if i do i dont think my sound driver has support for it, unless you guys think that updating to that version is safe too. Yea so basically should i update or not cause i dont wanna ruin my perfectly working hackintosh but i also want to get the latest updates. So is it worth updating or not and if it is then whats the safest way to.
Sorry this is so long but i hope you can help me out thanks!

You have to post all your hardware: mobo, video card, cpu, etc. No one can help you if you don't clearly spell out what components you have.