This is not 100% related to the JDBC driver.

If you read the Interbase Embedded SQLGuide, you see it's possible to set
transaction isolation level and other things like only allowing it to read.
Moreover there are lots of examples that use multipe transactions with
names an everything. I believe all the examples are based in some
preprocessor that allows you to put sql statements between C code, and it
requires declaring the names as C pointers...

Is ther a way to change the default behavior of the default transaction o
to create multiple transactions per connection using Java? does this
require support from the Driver implementation? is it possible to call SET
TRANSACTION READ ONLY;?

I'm aware that is this is possible, the program wil not work on other DBMS's.

Thanks anyway.