There is a setting in BIOS that will allow you to change the order in which devices are booted to. Easiest way (and least confusing for those who aren't 100% familiar with Installs) is to unplug the IDE and have only the SATA. Do the install and once you're finished, plug in the IDE, start the system and enter BIOS, then look around for the Boot Order Priority area and make sure your SATA drive is 1st.