autocommit in 7.4

Hi,

thanks for the new great version!

Only one small problem, how can I disable autocommit in Postgres 7.4  in
libpgtcl and psql?
I found something about .psqlrc but how is the syntax and how can I set it
for libpgtcl?

BTW, SET AUTOCOMMIT TO ON still gives no error, only SET AUTOCOMMIT TO OFF
says ERROR:  SET AUTOCOMMIT TO OFF is no longer supported.


Thanks and best regards,
Christian