upgrading from bind4 to 9.2.1

[Tichahleyi Mpofu]

Hie 
I have upgraded from bind 4 to bind 9 by doing the following.

1 .configure -prefix /usr/local
2 make
3 ./named-bootconf.sh < /etc/named.boot > /etc/named.conf 
4 make install
 
I am doing this on a test machine so i copied from the origional machine named.boot, and under /etc i copied all zone files and secondaries, 
 
after the above upgrade , i noticed i have named.conf , which is fine, but the problem is my zone files are still in the old bind 4 format, how can i upgrade them to new new format.
 
thanks