Well i dint know what kind of processor you have , but if its a intel or intel or an amd chip then you would want ia32 , its for 32 bit systems .
now if you have an amd64 or the intel 64 chip(cant remember the name of it) then either one would work , but i highly encourage you to use the ia64 only because its optimized better for that setup
now for ntfs , from my understanding ntfs is still a very buggy file system in linux .
mount /dev/hdaX /dir where you want it
that should work , im not sure if there is write support yet but i dunno , never used it
now if you wanted to have a better support for you windows machine in linux you could always switch to fat32 but you would lose your file permissions in windows but if its your personal machine then that wouldnt really matter