sorry i think i asked a bit confusing question,
i am an old user of dabian i have been using debian
since debian 5.0, now i am using squeeze 6.0 however
there are few software which i am working on.
and they have got a limitation to run on squeeze
only and they are not yet release for Wheeze so i
have to continue installing Squeeze in other systems
as well.
so i needed the 6.0 ISO files which i was unable to
found on debian main website due to 7.0 stable release.