Hi Jaime,
What I understand from your post is that you are not running Console, but want to run GhostCast server and just re-image the machines. In this way, you do not expect Ghost to handle the Configuration of the new machine such as Computer name changes.
Thinking about the floppy is not the best thing now a days, since executables like Ghost.exe are too large to fit in to a single floppy. If you chose to use floppies, you need to wait longer to boot, and use multiple floppy disks. You can consider booting from CD or USB flash drives. Ghost Boot Wizard supports creating them.
If you are imaging one machine at a time, there is no major advantage of useing GhostCast server, since multicasting is really beneficial when using more than one machine at a time (there are other advantages such as easy authentication etc.). If you do not want to use GhostCast server, you can create a drive mapping boot disk and map a share in your image repository. Then run Ghost using GUI or with command line and select the image since you wanted to do it manually.
One other thing you can consider is using WinPE. With Ghost32.exe you can image machines after booting to WinPE. This will take away the hassle of finding correct DOS driver etc.
Krish