You have to shrink the second partition, and then expand the first one.
You can use the livecd. It is better to take a backup before doing any partition operation.
Read carefully the documentation. There is a special chapter on ntfs resizing. Do each step alone, and boot to windows at least 2-3 times, running chkdsk on the resized partition.
It is better to run the system with a UPS, because any power failure can be fatal for the data.
(Topic moved to the live media section)
*** It is highly recommended to backup any important files before doing resize/move operations. ***