Ok... Which is better ZiPhone or iPlus?

WHich one will make Customize work along with Summerboard(I have 1.4) And running windows vista..?

Also why do some themes not work with summerboard? I install them but when i go to put them on none of them show!

Last question all of the Apps have alittle box next to it, Why do some have stars and other dont?

Please help this is all so confusing to me and nothing is working