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.
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.