paragraph without number

[montyline]

I'm using report, with 4 level of numbering (i mean, until: a.b.c.d), and when i use
paragraph enviroment, in the ps (not in the lyx screen) i get a.b.c.0.e. 

How can i avoid to get a number in the paragraph style? I want to have in bold letter 
or
something like that (to emphasize it, because 5 levels of deepness seems to be to much 
for
my document).

Thank you and excuse for my poor english.