I needed to create a custom taskPerformer that would generate a folder referencing my own replaceable parameter [blSubFolder] (similar to the [dalSubFolder] replaceable parameter used by LLBL to reference the DAL sub-folders' properties of the LLBL project).
I have to admit that it was almost trivial to create a generic task-performer that would:
1- create a folder from the value of a custom property
2- recognize the special replaceable parameter [blSubFolder] and replace it with the value of the custom property [BLSubFolderName]
The other cool thing also was debugging the project during the actual code-generation process following the instructions explained in LLBL's documentaion.
my JCL.TaskPerformers.DirectoryCreator task performer is in VB.NET but extends LLBL's own directoryCreator task-performer which is written in CS.
If anyone might find such a task-performer usefull, I will gladly share it (regretably the JCLFrameWork.NET site has issues with uploading the file because of DNN's moody behaviour )