If you want a different kernel you need to flash it after flashing the ROM. Also the problem about internal storage and GApps: as long as you flash the right hboot you should be fine, basically you need to flash the Desire Z hboot which gives you a bigger system parition (because the Desire Z had Sense which was bigger than AOSP which came on the G2) and you'll be set. I won't tell you how to do everything here, just find the appropriate guides for what you want to do here: http://forum.xda-developers.com/show....php?t=2348266 I personally wouldn't recommend any "performance" scripts but it's up to personal choice... if you think it makes your device better due to better multitasking or even just placebo then no-one's stopping you. Just be warned that I've discovered that most of the time those scripts make you think your device is faster just by disabling transition animations....