In reply to ganesh shetti:
First, the seq_item will be retrievded from the sequencer. The sequence is running on the sequencer, defining in which way seq_items are created.
Second, if you don't want to use a sequence to create your seq_items you do not need a sequencer.
Thiird, you need another source for your seq_items. Maybe they are coming from a file. Then you should make another mechanism in your driver to get the seq_items from your file, i.e. simple file I/O.