[MiKTeX] Files in repository

[Alain D. <esp...@sw...>]

Hello,

I just downloaded a full MiKTeX 2.6.2842 from the http site of belnet.

I am very astonished to see that there are
- .cab files
- .tar.bz2 files and
- .tar.lzma

Yesterday I tried to update the 2.5 version I have under Windows XP and 
the few first packages to be updated "did not exist".
(achemso, ae, alnumsec) and I realize that they are not anymore .cab. Is 
this the explanation?

So I have two questions:
1) will the installation af the 2.6 version work?
2) how to update the 2.5?

I have to know for my own work, to tell to my students and to install 
new versions on teaching machines (not very fast unfortunately).

Regards,

Alain Delmotte