I have done this using the powerquest deploycenter boot disk builder. Unlike the Ghost boot wizard, the powerquest boot builder has the capability to take a virtual floppy and build quickboot executable. This will allow you to your current virtual floppy you are using for you pxe server. Once you have built the executable use it with a transfer and execute task in the ghost console.
1) So first you will need to install the deploycenter toolkit (optional during ghost install) if you have not already installed it.
2) Make a copy of your virtual floppy used in you PXE server and rename it with
vfd extension.
3) Start -> programs -> Symantec Deploycenter -> deploycenter tools -> Boot Disk Builder
4) Tools menu -> Build a Quickboot Executable
5) Browse for your vfd file, enter the full path where you want the executable and do not check the prompt.
6) Test the executable on a test client to see if it works - be careful running or accidentally double click will reboot you box and go with no option to cancel.
7) Set up a ghost console task to do a transfer and execute task.