converting a procedure and query from mysql to mssql

Hi all 

i tried to convert a procedure from mysql to mssql server and fail :(

This is the procedure i want to convert

DROP PROCEDURE IF EXISTS famsubtree;
DELIMITER go
CREATE PROCEDURE famsubtree( root INT )
BEGIN
  DROP TABLE IF EXISTS famsubtree;
  CREATE TABLE famsubtree
    SELECT childID, parentID, 0 AS level
    FROM familytree
    WHERE parentID = root;
  ALTER TABLE famsubtree ADD PRIMARY KEY(childID,parentID);
  REPEAT
    INSERT IGNORE INTO famsubtree
      SELECT f.childID, f.parentID, s.level+1
      FROM familytree AS f
      JOIN famsubtree AS s ON f.parentID = s.childID;
  UNTIL Row_Count() = 0 END REPEAT;
END ;
go
DELIMITER ;

and this is the query i want to convert

SELECT Concat(Space(level),parentID) AS Parent, Group_Concat(childID ORDER BY childID) AS Child
FROM famsubtree
GROUP BY parentID;

Any help