I need code to insert Lot No. for 154 items in an item journal.[li][li]
How far have you got and where does it fail, or are you asking from the perspective of having nothing.
154 is not actually that many you know, dpending upon your aptitude in coding and testing and the format of the data it maybe quicker to enter them than to start a thread here!![:D]
Also are you an end user, or a partner?
Right it might be just one little bit of code that you run 154 times, not a big deal 
partner employee
What is the code
[li]
What are you trying to achieve?
I would guess, using a dataport, populate the item tracking lines after a different dataport has populated the item journal lines!