Like most other SAS regression procedures, PROC LIFETEST supports the STORE option, which will write the model parameters and other related information to a file called an 'item store.' You can then use PROC PLM to use the model to score other data sets. For an example and discussion, read the section titled "The STORE statement and the PLM procedure" in the article "Techniques for scoring a regression model in SAS." If you've never heard of the PLM procedure, the article has a link to the doc and to a SAS Global Forum paper about it.
I am not familiar with the %SDF macro. Do you have a reference?