How To Recover Master Database Table Data

Hi all, I am working with SQL Server2000 and I have done a horrible thing here.
We here have an script that delete all data from all user tables of a database, and I run it in the master DATABASE.
As we don't made backups of this database, now somethings of the database aren't working.

Here is the script:

declare @table_name sysname
declare @alter_table_statement varchar(256)
declare @delete_statement varchar(256)

-- definindo o cursor...
declare table_name_cursor cursor local fast_forward for
select
name
from
sysobjects
where
xtype = 'U'
and
name <> 'dtproperties'

-- desligando os vínculos...
open table_name_cursor
fetch next from table_name_cursor into @table_name
select @alter_table_statement = 'alter table ' + ltrim(rtrim(@table_name)) + ' nocheck constraint all'
exec(@alter_table_statement)
while @@Fetch_Status = 0
begin
fetch next from table_name_cursor into @table_name
select @alter_table_statement = 'alter table ' + ltrim(rtrim(@table_name)) + ' nocheck constraint all'
exec(@alter_table_statement)
end
close table_name_cursor

open table_name_cursor
fetch next from table_name_cursor into @table_name
select @delete_statement = 'delete from ' + ltrim(rtrim(@table_name))
exec(@delete_statement)
while @@Fetch_Status = 0
begin
fetch next from table_name_cursor into @table_name
select @delete_statement = 'delete from ' + ltrim(rtrim(@table_name))
exec(@delete_statement)
end
close table_name_cursor

open table_name_cursor
fetch next from table_name_cursor into @table_name
select @alter_table_statement = 'alter table ' + ltrim(rtrim(@table_name)) + ' check constraint all'
exec(@alter_table_statement)
while @@Fetch_Status = 0
begin
fetch next from table_name_cursor into @table_name
select @alter_table_statement = 'alter table ' + ltrim(rtrim(@table_name)) + ' check constraint all'
exec(@alter_table_statement)
end
close table_name_cursor


deallocate table_name_cursor


I have tried to restore master table with the restore function, but it doesn't work. When I try to do this I received a message informing that it can't copy the data because one file was in use. The server was in a single user mode.

Is there anyway to recover the data that I have lost?