There are a number of posts or examples here which may or may not be smart to put in to production or if you do, pay very careful attention to them when you do an upgrade.
The Lawson documentation is pretty clear that you should only use their documented interfaces in Smart Office – and I can see instances such as the changing the filter values coming unstuck should Lawson change the layout of the ListViews column headers. I am only doing this out of interest and to learn how the client works.
Where I *think* that there is likely to be issues I will put them under the “How Far is Too Far?” category – but as always, use at your own risk.
Happy hunting! 🙂