OK.. there are a couple of problems here.
the main one is the image u posted is 482x810, ...getting it in a 400x150 banner presents a huge challenge. most people would say it cant be done (at least to look presentable), as the image would get badly skewed. or if the ratios are kept intact, it would be in a 89x150 box within a 400x150 banner. (a bird/bat in your image would then be little bigger than the fullstop at the end of this sentence.)
i have solved this problem in an earlier thread, by chopping a huge image and getting only relevant parts to fit in the banner. see the thread here..
Banner request
let me know what you think.
my second query is what do you mean by "I want the whole thing to be twisted" please elaborate a little.
-uni