i used this one:

http://www.lavishsoft.com/wineq2/

to 6-box in eq.

There is a free version of that program on the homepage, u just missin some features
but its enough to 6 box.

Easy configuration and you can bind keys to special windows i.e.


alt+1 bring your first eq window up .... alt+2 the second one and so on.

Regarding Vista 64 ? just try it out i would guess

Greetings

Hertome