Customising the xp logon screen

[apoutney]

I have a tablet PC running Windows XP and I want to setup passworded user accounts. The problem though is that there is no keyboard accessible on the tablet to use to type in a password.

I know that in there is a screen keyboard as part of the accesibilty options in Windows that can be setup to appear on the logon screen BUT I wanted to use one i have created as part of the corporate software that is running on the table.

Is there a way I can get the screen keyboard I have created to appear on the logon screen so that it can be used to enter in passwords.