I need to run mysql v3 (for an old application) and v5 on the same server.

I installed both versions and they run on their own. Basically I want to
run v3 on port 3303 and v5 on the default port

I tried to startup both with mysqlmanager and created /etc/my.cnf
[manager]

[mysqld3]
mysqld-path = ....
port = 3303

[mysql5]
mysqld-path = ...
port = 3306


but both startups fail when I startup mysqlmanager.
maybe mysqlmanager is not the way to go here ?
any ideas ?

TIA
Martin