I would add a splash screen in the package, it's more flexible. You can add a info/text/message in your LD Packagebuilder package or you can add a message box in a AutoIT/VB script/Batch...
It depends which kind of package you deploy. But there exist no messaging in LANDesk V8.x, perhaps in V9...?
We prefer to add a splashscreen in our AutoIT deployment packages. If a user is logged in he'll get a (mostly non closeable) message about the installation status, the messages will be written in a logfile and to the LANDesk Scheduled Task.
Otherwise, you can try to add some other messaging possibilities, like the following and add the functionality in your packages:
VBS-Messageboxes are too unsexy
But i just compiled a little autoIT-Script, which does a prefect job using the "tooltip" function:
for $CPT=2 to $CMDLINE
$ARGS&=$CMDLINE[$CPT] & " "
ToolTip($ARGS ,0,0, "Software Deployment", 1, 4)
$sleeptime = Int($CMDLINE)
i call it from my batchfiles with tooltip <milliseconds> <message>.