Do it! You'll never go back.
Parts you'll need:
-front subframe (Tuono, not Mille - it's weaker, may vibrate at speed)
-fairing
-front light (Mille will do - later model of early one - 2001-2003 I think)
-Tuono top yoke + risers + handlebars (or aftermarket set - check german ebay), or just fit Convertibars like me
-longer brake and clutch lines
-mirrors (bar end?)
-stearing damper (stock Mille will do) You will need it

but not necessarily
-the rest is looks: bellypan, radiator covers... The list is endless...
Basics would cost you roughly 500, less if you're not in a hurry. You'll

it.