-Based on CyanogenMod 9
-With Mackay kernel (updated to 3.0.101, updated governors & schedulers, XL RAM some other nice stuff):
-no 720p possible, XLMem (do not ask for other flavours, I just make a one-flavour option tuned for smoothness)
This are the latest official gapps. Newer gapps can be found here:
(I haven't tested this package, I also don't think latest gapps is relevant, as gapps get updated through Play Store anyway)
-From existing CM9: install on top + flash gapps
-From any jellybean ROM: you can try to install it on top, but it may result in bootloops, requiring flashing GB through Odin (see below for next steps). Flash ROM. Flash gapps.
-From stock Samsung GB: install CF-ROOT-CWM kernel, or any other CWM containing kernel. Flash ROM. Flash gapps.
You need to flash gapps on every new build, backup/restore of gapps does not work yet!
If you have space issues, you can use a solution to bind /datadata to /data partition:
THIS IS NOT AN ADVICE TO DO THIS! I do not like this solution, as it will slow down your phone (especially with the slow internal memory chip). And it goes against my lean & mean philosophy for this ROM. Therefore: please think well before doing this!