download menu files from the download section start from the 9 part from this thread : Flash K800 CID53 with K810 software CID53 (for begginers) - Top Sony Forums, extract the menu files inside FAR manager and navigate it to tpa/preset/system/menu, now copy or select the files (i.e *.png, msnu.ml etc) one by one and pressing the F5 after selecting each file (you may need to delete the original files in your phone) after copying all the menu files, keep on double clicking the ".." until it ask to for yes or no and click yes. that's it you're done. reinsert battery and see you newly installed menu