DECLARE @Test varchar(max)
SET @Test = ''
SELECT @Test = @Test +'ALTER TABLE '+Object_Name(Object_Id)+' ALTER COLUMN '+NAME+' Uniqueidentifiier'+CHAR(13)+CHAR(10)
 FROM sys.columns
 WHERE system_type_id = 175 
   AND max_length = 36
   AND Object_Name(Object_Id) NOT LIKE 'sys%'
 print @test

(Slaps head) - I had forgotten you could concatenate inline. Boris wins the refactoring award! Thanks.