Is that a Windows 7 Recovery partition and Installation on C which you now want to overwrite with Vista? Why?
If this is the case then I would make my Windows 7 Recovery Disks and wipe the entire HD using Diskpart to convert it back to Basic, since The Recov Partition won't run after Vista install anyway. SSD - HDD Optimize for Windows Reinstallation
If you instead want to Dual Boot Vista with Windows 7, then try the non-destructive Conversion using PW 4.2 CD, rightclick C to Resize making space for a New Logical partition upon which to install Vista, same as here: Dual Boot Installation with Windows 7 and Vista
However I would wipe the HD since the Recov partition isn't going to run anyway and the 100mb System Reserved was cut out as the boot partition by C which now holds the System boot files, and is useless too.
Normally we see split disks Basic/Dynamic when a manufacturer retains Primaries because they need to boot - 100mb to boot Windows 7 and Recov to take Active when it's hotkey is triggered at boot.