How do you make a hard drive type CD boot image?  When making a bootable CD with Roxio and selecting to emulate hard drive the only option is to use an existing boot image.  But I don't know how to make one?

Dell™ Inspiron™ 8600
Intel® Centrino® Mobile Technology

Pentium®M Processor,1.4 GHz
15.4 in WUXGA (Wide Aspect UltraSharp™ Display)
128MB nVidia® GeForce™ FX Go 5650 4X AGP Graphics
512MB,DDR,333MHz
40GB Ultra ATA Hard Drive
2x CD/DVD Burner (DVD+RW/+R)
Intel® PRO/Wireless 2100 WLAN
Dell™ TrueMobile™ 300 Bluetooth