add 2 hdd drive on raid controler

my board is abit dual cpu and raid vp6-2raid
2 hdd 30g on raid 0
windows 2000
my question is:
1- if i put 2 more drive on cotroler slave raid they come raid 1 or 0
2- and windows boot after yes or no
3-or if i put on ide windows read 4 drive or 2.
thank you Marc