I do this moment for a friend, I never had a Xperia X8
But I flashed GingerDX for him (stock Kernel), then installed Temple Run and Chainfire3D.
I installed the driver and then everything is set there.
Then I installed Swapper2 and in the menu I made these settings in post 1, but after I clicked to "ON", this appear:
setting swappiness OK
turning swap off(file) FAIL
swapoff: can't stat '/sdcard/swapfile.swp': No such file or directory
swapon: can't stat 'sdcard/swapfile.swp': No such file or directory