It looks like section 2-5 on page 44 of your motherboard manual has all you need to set the HDD as the first drive and then to set it in the boot order you prefer.
Section 2-8 on page 52 allows you to reset to the default BIOS settings. To return the board's BIOS to out-of-the-box condition, you will want to use the CLR_CMOS jumper as outlined on page 24.