Vajarasattva Repentance Sadhana

Hi Everyone, can somebody tell me:  
 

     What is the Vajarasattva repentance Sadhana ?        

 
     - Is this practice just another name for the Vajarassatva
       practice ? If yes please disregard the following  
       questions.  


     A) Background and Origin
             * Is it closely related to the 100 syllable mantra?    
             * How it differs from the other repentance Yogas ?  
             

       B) Purposes and Objectives
             * Specific purposes like eg, eradicating karma,
                enhancement etc.    
             * Benefits of this practice.
             
     C)  Mudras, Mantras and Yantras associated with this
          practice

     D)   How many practices are needed meet the minimum
           criteria (such as 100,000 recitation is    
           needed for the foundation practice of the hundred
           syllable mantra). pls dont answer as much as
           possible-i know that   >:( 
       
     E)    What is the meaning of Sadhana ?
     

Thanks to anyone who answer  ;D.

erwin:

yeppies: the vajrasattva repentance sadhana is basically identical to our vajrasattva practise. Why? Coz both involve repentance and the recitation of the 100 syllable mantra. So practising the Vajrasattva practise is basically the same.