a lot of people here r quite excited on kastor ui
here a video of it running on the tube ( its not my tube n im not using tis as my phone isnt hacked lol )

as u could see kastor ui is actually theme effects for nokia phones...in fact the default theme effect is actually being built based on kastor ui technology...if u hack ur phone u could swap ur theme effects besides the default ones...
if im not mistaken u could install kastor ui patch using Rompatcher if ur phone already hacked n u can add effects by putting the theme into certain folder in c:\ drive (u need to hack ur phone in order to access the folders)...correct me if im wrong lol