[TYPO3] Challenge: render IAProcFunc menus differently based on returned record content

[Peter]

Ok, here's the simple bit:

lib.myMenu = HMENU
lib.myMenu {
   1 = GMENU
   1 {
     itemArrayProcFunc = tx_myext_myplugin->getMenuRecords
     NO = 1
     NO {
       ATagTitle.field = title
       allWrap = <span class="navItem"> | </span>
       backColor = #999999
       XY = 100,20
       10 = TEXT
       10 {
         text.field = title
         fontColor = #ffffff
       }
     }
   }
}

This works perfectly, produces the result you would expect, a menu based 
on the array returned by getMenuRecords.

The challenge:

The array returned by getMenuRecords contains rows from a plugin table 
rather than page records. In addition to the useful and required 
'title', 'uid' etc, one of the fields returned in each record in the 
array is labeled 'myfield'.

What I need is for NO to be different based on the field 'myfield':

     NO {
       ATagTitle.field = title
       allWrap = <span class="navItem"> | </span>
       backColor = #eeeeee
       XY = 200,40
       10 = TEXT
       10 {
         text.field = title
         fontColor = #333333
       }
     }

[] can't be used inside lib.myMenu.1, and is useless outside as 
'myfield' is out of scope.

NO = CASE can't be used or I can't determine a way to use it for this 
purpose - the contained parameters are always ignored resulting in a 
blank white image of default size

Despite much wrangling I can't see how I can work an IF statement into 
the GMENU so that the entire NO entry is different based on the content 
of the 'myfield' field.

I could, potentially, get away with making the differences exist only 
inside lib.myMenu.1.NO.10 but still can't see how I can use CASE or IF 
to do this.

Any ideas anyone?

Peter.