e.g.
declare @cmdxmlout varchar(1000)
declare @ret int 
declare @tempfullpath varchar(500)  

set @tempfullpath = 'c:\test.xml'

set @cmdxmlout='bcp "' + @sql + '" queryout '+ @tempfullpath +' -S(local) -T -c -r -t'
exec @ret=master..xp_cmdshell @cmdxmlout,no_output

use tempdb
go
if exists (select * from dbo.sysobjects where id = object_id(N'[testload]') 
and OBJECTPROPERTY(id, N'IsUserTable') = 1)
drop table [testload]
go
create table testload(filedata text NULL)
go

BULK INSERT testload FROM 'c:\load\1.txt' 
BULK INSERT testload FROM 'c:\load\2.txt' 
BULK INSERT testload FROM 'c:\load\3.txt' 
BULK INSERT testload FROM 'c:\load\4.txt' --divisible by 4 !!
BULK INSERT testload FROM 'c:\load\5.txt'
go

select * from testload
go

if exists (select * from dbo.sysobjects where id = object_id(N'[testload]') 
and OBJECTPROPERTY(id, N'IsUserTable') = 1)
drop table [testload]
go

Results :

1
12
123
12345