Lets download Everything we need for the Mac part.
For Ease download them all to the Desktop in a folder called "Mac Theme" or another easy access folder.
First of all - the dock. Download Rocketdock from Here
Next goto this website
to download the menubar (if it doesn't work - try here
Download the files to patch your systemCheck your service pack first for XP
- right click properties on My ComputerWarning this is for Vista!!! Do not apply this on an XP machine.
Download the one for Vista with Service Pack 1 Here
(x86) NOT 64 bitWarning this is for XP!!! Do not apply this on a Vista machine.
XP users please try here - SP2 here
... SP3 here
or, if broken try googling leopardxp or "uxtheme.dll SP3 XP download"
64 bits- im sorry but i dont exactly have the files - try searching for 64 bit uxtheme.dll patch on Google - also you will need to find your own theme (sorry!)
Now download the themeHere for VistaHere for XP
The CursorsInstaller - just save this
Just download all of that and you should be good. (Again - I'm not sure about 64 bit)