This question has already been raised by someone else.Unfortunately i did not see any answer.
Because this is one important issue for my application i want to post it again and hope will get an answer:

Question:

How would you modify the CRUD Data entry so that a user would use a drop down box linked to a lookup table to enter a field on the screen. Is there a property to modify to allow a drop down list?

Front end in ME4S is generated in Adobe Flex or in Spring MVC.

There is not a property to modify that will automatically cause a dropdown to appear that uses a lookup table. You would need to make the data available to your web controller, then hook up the dropdown using normal flex programming techniques.

It's important to understand that the generated user interface components are intended to be a starting point for your application.

I am faced with the same issue after creating the CRUD. I understand that the CRUD is just the starting portion. While generating the CRUD, it asks to identify just the parent tables. The end result after choosing that option is that the said relational fields disappear from the web layer.

It can hurt to put up a tutorial to show how a simple state or country lookup will work. There are a dozen different tutorials that stop at creating the crud application. None will take it a step further.

Cheers

Shankar