|SLEEP and CHOICE aren't available to XP command prompt.|
Apparently you can use the PING command to force a delay:
In the example there the delay is 2 seconds.
There's also a link there to windows 2003 resource kit that has a sleep command and it implies you can use it for XP.
An internet search should turn up a lot of other methods that may or may not work with XP.
Obama's a 2012'er. That explains EVERYTHING..