Cusotm Error msg box ?

[Resurr]

is it possible to run a dos command that will make a box come up that looks like the error msg boxes not an error but i want it to say something like Hi and welcome to Windows

[XtremeMaC]

yes its possible

parse this to registry

Windows Registry Editor Version 5.00

[HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon]"LegalNoticeCaption"="write something over here"

"LegalNoticeText"="write something else right here"