New Version of Code Aster

Hi,

I think it is quite simple to answer my question because I'm just a little bit confused. The CAELinux distribution has two folders with Code-Aster versions:

[code:1]/opt/aster101/[/code:1]
and
[code:1]/opt/SALOME-MECA-2010.1-x86_64/aster/[/code:1]

If I want to create a new Code Aster Version and update it,
which folder is the one where I should place the new version?

Maybe my question reduces to: what is the purpose of the two folders and their difference?

Thanks a lot in advance,

Ralf