asus eeepad 安裝新的rom

請問一下有人成功安裝
http://forum.xda-developers.com/showthread.php?t=1245892
裡面有個步驟我一直弄不出來
Boot your phone in recovery mode (vol down + power)
In main menu, select "install zip from sdcard"
我用vol down+power只看到wipe data和正常開機的選項~麻煩各位高手了~