It looks like you have two partitions, or Windows thinks it does.
Right click on My Computer then select Properties. From there go to the Advanced tab and then Startup and Recovery. In there you can set the time delay and default OS to select. If you click on edit you can manually edit the text file to read as follows:
[boot loader]
timeout=30
default=multi(0)disk(0)rdisk(0)partition(1)\WINDOWS
[operating systems]
multi(0)disk(0)rdisk(0)partition(1)\WINDOWS="Microsoft Windows XP Home Edition" /fastdetect /NoExecute=OptIn
You might think I'm clever, (I am), but it's been on here before, so I'll have to pass the credit to
goates See
here or I should of said nothing and claim the credit!
Back up first though! to prevent