Have you actually saved out data for the timestamped columns when you created the file you're loading from? If not then you can specify the LOAD DATA command to load the data into specific fields in the table. If you skip the timestamp column I assume that it would put in the current date, e.g. if you table had columns
name, address, telephone, time
LOAD DATA INFILE 'persondata.txt' INTO TABLE persondata (name, address, telephone);
I haven't checked this, but just in case it helps I've said it.
(5 mins later, I've just checked it and it does work - but don't know how this will help if you were loading that extra column)