Expand the dir levels in the LevelNDir class (Level1Dir-Level6Dir)

Is it possible to expand the number of levels (1-6) to i.e. 10 levels in
the 
LevelNDir class/table?, and if so, how whats the quickest way to do it?

"LevelNDir
This symbolizes the six cl***** used to represent the six levels in a 
hierarchical directory structure. Each level contains a directory name and
a 
link to a URI object
"

TIA, Gert.