Quick question about adding the code to the sysctl.conf file: Do you completely replace the existing code with your suggested code, or append yours to the existing?
Completely replace the existing code. However, if there is already a value for say...vm.dirty_ratio (example), you have the option of keeping the original or replacing it with mine. Don't keep both.
Anyway, I updated the OP with a bit of info for those of you who want a brief idea of what this does. After reading it, you can deduce what the mods are actually doing to the phone.