I have actually already have a nersc cert. It's automatic with your account.

Test a gridftp from  from RCF site

1. ssh rssh.rhic.bnl.gov
2. ssh to stargrid node (01,02,03,04) , e.g.  ssh   stargrid01
3. create proxy at stargrid node : myproxy-logon -s nerscca.nersc.gov -t 240 

   myproxy-logon -s nerscca.nersc.gov Enter MyProxy pass phrase: [enter PDSF NIM password] A credential has been received for user balewski in /tmp/x509up_u3329

   You specify how long you want your cert to last with '-t hours' option.  The limit is ~11 days.
4. verify proxy expiration time : grid-proxy-info

   Here's an example of a proxy on our ALICE installation with CERN cert subject : /DC=ch/DC=cern/OU=Organic Units/OU=Users/CN=jporter/CN=482817/CN=Jeff Porter/CN=1269780641 issuer : /DC=ch/DC=cern/OU=Organic Units/OU=Users/CN=jporter/CN=482817/CN=Jeff Porter identity : /DC=ch/DC=cern/OU=Organic Units/OU=Users/CN=jporter/CN=482817/CN=Jeff Porter type : Proxy draft (pre-RFC) compliant impersonation proxy strength : 512 bits path : /tmp/x509up_u49514 timeleft : 39:58:38 (1.6 days)

5. transfer of a single file from RCF to PDSF:  

xxxx