How to set SSIS flat file connection row delimiter to blank line?
You can't specify a ROW (even empty) as a row delimiter. The problem is not really with the flat file connection. Actually there is another problem here than just row delimiter - you need to combine multiple rows of input and "pivot" them to create one row in the output table.
This calls for multiple steps in your package:  


create a temp table with one col to hold the input file.  
input the raw data into that temp table.  
write some SQL code (i would encapsulate it in a stored proc) to process the raw input and build rows of data. this needs to be done in using a cursor. you loop thru each input and build a record until you reach an empty input. then you write out as output. continue until no more records in temp table.  


Hope this helps.