SQL 2005 Backup Problems

We have a SQL 2005 server running the following backup job:

EXECUTE master.dbo.xp_create_subdir
N'\ServerBackupsDBServerName\DB_Name__METABASE '

GO

EXECUTE master.dbo.xp_create_subdir
N'\serverBackupsDBServerName\DB_Name__MSCRM'

GO

BACKUP DATABASE [db_name__metabase] TO disk = N'\serverBackups
DBServerName\DB_Name__METABASE
DB_Name__METABASE_backup_200610261158.bak' WITH differential ,
noformat , noinit , name =
N'DB_Name__METABASE_backup_20061026115839' , skip , rewind ,
nounload , stats = 10

GO

DECLARE @backupSetId AS INT

SELECT @backupSetId = position
FROM msdb..backupset
WHERE database_name = N'DB_Name__METABASE'
AND backup_set_id = (SELECT MAX(backup_set_id)
FROM msdb..backupset
WHERE database_name =
N'DB_Name__METABASE')

IF @backupSetId IS NULL
BEGIN
RAISERROR (N'Verify failed. Backup information for database
''DB_Name__METABASE'' not found.',16,1)
END

RESTORE verifyonly FROM disk = N'\serverBackupsDBServerName
DB_Name__METABASEDB_Name__METABASE_backup_200610 261158.bak' WITH
FILE = @backupSetId , nounload , norewind

GO

BACKUP DATABASE [db_name__mscrm] TO disk = N'\serverBackups
DBServerName\DB_Name__MSCRMDB_Name__MSCRM_backu p_200610261158.bak'
WITH differential , noformat , noinit , name =
N'DB_Name__MSCRM_backup_20061026115839' , skip , rewind , nounload ,
stats = 10

GO

DECLARE @backupSetId AS INT

SELECT @backupSetId = position
FROM msdb..backupset
WHERE database_name = N'DB_Name__MSCRM'
AND backup_set_id = (SELECT MAX(backup_set_id)
FROM msdb..backupset
WHERE database_name = N'DB_Name__MSCRM')

IF @backupSetId IS NULL
BEGIN
RAISERROR (N'Verify failed. Backup information for database
''DB_Name__MSCRM'' not found.',16,1)
END

RESTORE verifyonly FROM disk = N'\serverBackupsDBServerName
DB_Name__MSCRMDB_Name__MSCRM_backup_200610261158 .bak' WITH FILE =
@backupSetId , nounload , norewind

This job was set up long before i started here and the problem is that
the backup file itself has grown to be over 230 GB. It does not
appear that the backup job is pruning the file. is there a way to
view the contents of this file and then prune it so we keep no more
then two weeks worth of data.

Thanks