Chaos

I have a 47LB720T Tv in South Africa, running 04.62.43 My main reason for this tv is to stream Netflix and Hulu, and using UnoTelly I have this working fine. I was able to change the region using the IR LED and sound file hack, and could get into the Service menu fine, change region, download apps, and then change back to South Africa. Now for the past few months, the TV has been telling me about the update to 05.00.15 however I have always denied the update. I have a feeling that if I update, I will probably lose the ability to access the service menu, change region, and will probably lose the apps that are loaded currently (or won't be able to update them when they need updating) Can anyone confirm or deny this? In other words, from a streaming media/region code/service menu aspect, would this update make me go backwards, and prevent me from using those apps again? Appreciate any advice.