All you need to do is to change the settings in the bios.
Go into the Bios
Check if all your drives are recognised correctly just as a precaution. Note which one is your iDE drive.
Then go to Boot Menu
Go to Boot Menu
Boot Menu: Advanced
Boot Priority: Hard Disk Drive First = Make sure that this is the sata drive not the IDE
Drive else it will boot in the IDE Driver.
Boot to Removable Devices Disable
Boot to Network Disable
Boot to Optical Device Disable
USB Boot Disable
Boot USB Device First Disable
USB Mass Storage Auto
Save and Exit.
Try this, i will boot on your SATA drive. Now if in the future you would like dual OS boot, use a tool called Vista MultiBoot (quite handy)
Hope this helps a bit.