renaming tables sql server, cascading change by pk fk's

i wish sql management something where i have list named tblfoo i wish name tblfoobar. however, i wish primary pivotal also change, example, now is:

constraint [pk_tblfoo] primary pivotal clustered 

and i wish name change change to:

constraint [pk_tblfoobar] primary pivotal clustered 

then, recursively by cascade change tables have foreigh pivotal relationship, eg. this:

check supplement  imprisonment [fk_tblcontent_tblfoo] unfamiliar key([fooid])

to this:

 check supplement  imprisonment [fk_tblcontent_tblfoobar] unfamiliar key([fooid])

naturally, i am perplexing by manually since a) an blunder likely process, b)it doesn't scale.