Basically, my question is simple but it requires someone that knows Struts 1.1 and is still alive.
What I try to build looks like this in Pseudo-Code:

IF element.method1 = true THEN
   IF element.method2 = true THEN
      COLOR.GREEN, PRINT element.prop1
   ELSE
      COLOR.RED, PRINT element.prop1
   END
ELSE
   COLOR.BLACK, PRINT element.prop1
END

The whole thing would happen inside a iteration. So here what is currently working but not yet the goal:

<nested:equal property="method1" value="true">
    <nested:write property="prop1" /> 
</nested:equal>

<nested:notEqual property="method1" value="true">
    <nested:write property="prop1" />
</nested:notEqual>

Now what really drives me crazy is that this works as well:

<nested:equal property="method1" value="true">
   <nested:equal property="method2" value="true">
   </nested:equal>                
</nested:equal>
                        
<nested:notEqual property="method1" value="true">
   <nested:write property="prop1" />
</nested:notEqual>

But whenever I insert something between the two inner nested:equal tags it wont compile.
So my final solution (see below) wont compile complaining "Missing Endtag for nested:write."

<nested:equal property="method1" value="true">

   <nested:equal property="method2" value="true">
           <nested:write property="element.prop1" />
   </nested:equal>   
                        
</nested:equal>
                        
<nested:notEqual property="method1" value="true">
    <nested:write property="element.prop1" />
</nested:notEqual>

After about 4 hours I still don't have a idea how I could manage this so any suggestions would be really appreciated and helps even 2 weeks after this post because my next step is to dig into Struts 1.1 Documentation.