help on src.rpm files

[sylvan dacounha]

  Dear All..
   
  Iam using centos 4.5 and i want to install opensslxxx.xx.src.rpm file 
   
  how do i do it
   
  also there is no /usr/src/redhat directory
   
  do i have to create this directory n other directories under this
   
  basicallly how do i install .src.rpm files in centos 4.5
   
   
  apprecite your help
   
   
  regards
   
   
  simon
   
   

       
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