RA-DEC from DSS headers

[Boris Babic]

Hi 
 I was wondering if anyone could tell me how to calculate an objects RA and 
 DEC from the plate solution co-eff's as given in the DSS fits headers.
 with the skyview headers its possible to calculate the positons given
 CRVAL1,CRVAL2 ,CDELT2,CDELT1 and the NAXIS1,NAXIS2 values ,although it
 doesnt appear that simple with the DSS headers. Note: Skyview returns
 the DSS headers if the field is small,so in this case i cant work out the
 RA-DEC either.
 thanks boris