rpg 2003 battle sprite issue

[noofer7]

Most of my experience is with RMXP, because I first started making RPGs with the free trial of XP.  Then I got RM2003 and was planning on using that when the RMXP trial ran out since I like 2003's battle system better anyway.  So I was making a game based on something a friend of mine and I invented, and there are some characters in the game who can transform.  I thought I had the system all worked out, but then I discovered that RM2003 has no event command to change a character's battle sprites!  Is there any way to change them???