I didn't catch whether the original postee still has access to the old database, but for future reference, the mysql 4.1.x version of mysqldump (the command line backup utility) has a backwards compatibility switch.
--compatible=name
Produce output that is compatible with other database systems or with older MySQL servers. The value of name can be ansi, mysql323, mysql40, postgresql, oracle, mssql, db2, maxdb, no_key_options, no_table_options, or no_field_options. To use several values, separate them by commas. These values have the same meaning as the corresponding options for setting the server SQL mode.
Every time I backup my db I do so with each of mysql323, mysql40 and without the switch so no matter where I go in the future, should the need arise, I have a usable backup.