Implementing a customized HHLoginForm

My employer wants a customization to the HHLoginForm, that would permit a handheld user in the warehouse to scan a barcode on a printer, then setting the Workstation/Printer based on the scanned value. After struggling through some initial problems getting my customizations to “stick”, I figured out what was going on and managed to get the customizations to stick by using the Custom XML Editor, (I can elaborate on the workaround for that problem, if anyone is interested).

So now, I have a customization that does what we want it to do. My problem is, I don’t know how to trigger the client to use this customization upon login. I know about the HHCustomMenuID setting in the config file and we have a working customized handheld menu. But, this doesn’t have any affect upon the HHLoginForm, which is called prior to the custom menu.

If anyone can point me in the right direction, it would be greatly appreciated!