You can change the PP with instructions here
no need to cook just patch the .nbh .
Try the ROM provided as runs very smooth also it's the light version so gives more space another way to free tiny bit more is disable MSVC
The PP balances speed v's RAM but on 4.5 with Ricky Remade you hardly notice it, on 6.5's it's a very different story as they using far more processes to start with and lowering the PP really slows it down.
Opera Mobile i'm still running 8.6 "think that's the one" put it this way my gf uses the Excalibur and never has any issue using net etc even though she never shuts down anything lol