Hi Javern,
What protocol are you load balancing through LTM? For HTTP, you could use a stream profile to inject Javascript which creates a popup in responses. We've discussed this type of response content injection in a few recent posts:
http://devcentral.f5.com/Forums/tabid/1082223/asg/50/showtab/groupforums/aff/5/aft/1171990/afv/topic/Default.aspx
http://devcentral.f5.com/Forums/tabid/1082223/asg/50/showtab/groupforums/aff/5/aft/29379/afv/topic/Default.aspx
http://devcentral.f5.com/Default.aspx?tabid=53&aff=5&aft=1144860&afv=topic&afpgj=1
Aaron