Elsa,
> Is there a mean to install PostgreSQL Server & client on a windows PC
> without installing Cygwin??
Not at this time, no.
> Indeed, I found binaries there :
> http://hp.vector.co.jp/authors/VA023283/PostgreSQLe.html
> but this seems to be bugged.
There are actually 3 seperate projects working on porting Postgres to
WIn32-native. The core developers expect that one or more of these
efforts will succeed before the end of the year, possibly even in time
for PostgreSQL 7.3 (expected sometime in September-October).
However, no Win32 native version is working at this time. Use Cygwin.
-Josh Berkus