Slurs in TabStaff

[dwaynec]

Hello,
   I have been having great success using lilypond to make up guitar 
scores with tablature, but I am running into trouble expressing hammer 
ons and pull offs, I would like to put in a slur with an "H" or a "P" 
above it, either above or below the 2 notes (numbers on the tabstaff),  
Is there any way I can force lilypond to show my slurs ?

code example:

e( d)

I guess there must be some way of getting the right result. Hope someone 
can help

Cheers
Dwayne