Create PostgreSQL script database and ER from Oracle SQL

It's a small project but It will save me some time. I have an Oracle script and I need: a) The ER model (reverse engineering) - delivery in JPG/PNG b) A working PostgreSQL script Info: a) It's about 72 tables. 60 sequences, 54 triggers, 465 alter table, 343 insert into and 137 create index. b) 3185 lines of script. Requirements: a) I cannot attach the script here because it's not an open source project, so, If you need any other info beyond these above ask me. b) The script must work with all components, tables, constraints, indexes, triggers, sequences etc..