I just tried and was not able to do it.
restore headeronly from disk='d:\stage\GLYNNE_backup_200510131516.bak'
gave me the following error;
Server: Msg 3205, Level 16, State 2, Line 1
Too many backup devices specified for backup or restore; only 64 are allowed.
Server: Msg 3013, Level 16, State 1, Line 1
RESTORE HEADERONLY is terminating abnormally.
From the SQL 2005 online help;
Backups created with Microsoft SQL Server 2005 cannot be restored to an earlier version of SQL Server.