Is it possible to make my xp look like vista safely and for free?

hi all at the min iv got xp sp2 but would like it to look like vista but without actuallty buying vista ive got a emachine 3230 pentium4 2.8 cpu speed 1gb ram and a 4200 nividia graphics card ive herd some freeware programs work but some come with glitches shall we say ive herd some briopacks work and r safe and dont slow your machine down too much and if poss would like it to have the 3d flip like ultimate and the side bar too thanks for your advice