I found a software recommendation that meets your requirements:
Macrium Reflect Free Edition
- Features:
- Create a disk image while running Windows using Microsoft Volume Shadow copy Service (VSS).
- Image to Network, USB, FireWire drives, and DVD.
- Built-in scheduler.
- 32-bit and native 64-bit versions.
- Industry-leading compression levels and speed.
- Linux-based Rescue CD with Network access and full GUI.
- Built-in CD/DVD packet writing engine. Supports packet writing to DVD DL media with Windows Vista.
- HTML log files.
You can download Macrium Reflect Free Edition from
CNET. This software should meet your needs for disk imaging and backup with support for FireWire drives.