Using Osmosis, bzcat and Postgresql

I'm using Osmosis to load an extract of OSM data for the USA into a Postgresql database. I have previously used osm2pgsql.exe to load data into a postgresql database, but it is taking an extremely long time to load on my computer (Win 7 64 bit) using osm2pgsql 32 bit with the -s argument. I'm a unclear about a couple of things using osmosis and bzcat. On the Osmosis wiki page I see the following instructions:

Import a planet file into a local PostgreSQL rails port database.

osmosis --read-xml file="planet.osm" --write-apidb host="x" database="x" user="x" password="x"

I changed this line to the following, and tried adding a port argument

osmosis --read-xml file="J:\DATA\OSM\massachusetts.osm" --write-apidb host="localhost" database="osm" user="postgres" password="**" port="5436"

The error message I got was the following:

J:\osmosis-0.40.1\bin>osmosis --read-xml file="J:\DATA\OSM\massachusetts.osm" --write-apidb host="localhost" database="osm" user="postgres" password="***" port="5436"
Mar 19, 2012 11:28:16 AM org.openstreetmap.osmosis.core.Osmosis run
INFO: Osmosis Version 0.40.1
Mar 19, 2012 11:28:29 AM org.openstreetmap.osmosis.core.Osmosis run
INFO: Preparing pipeline.
Mar 19, 2012 11:28:32 AM org.openstreetmap.osmosis.core.Osmosis main
SEVERE: Execution aborted.
org.openstreetmap.osmosis.core.OsmosisRuntimeException: Argument port for task 2-write-apidb was not recognised.
        at org.openstreetmap.osmosis.core.pipeline.common.TaskManagerFactory.createTaskManager(TaskManagerFactory.java:64)
        at org.openstreetmap.osmosis.core.pipeline.common.Pipeline.buildTasks(Pipeline.java:50)
        at org.openstreetmap.osmosis.core.pipeline.common.Pipeline.prepare(Pipeline.java:112)
        at org.openstreetmap.osmosis.core.Osmosis.run(Osmosis.java:86)
        at org.openstreetmap.osmosis.core.Osmosis.main(Osmosis.java:37)
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
        at java.lang.reflect.Method.invoke(Unknown Source)
        at org.codehaus.plexus.classworlds.launcher.Launcher.launchStandard(Launcher.java:329)
        at org.codehaus.plexus.classworlds.launcher.Launcher.launch(Launcher.java:239)
        at org.codehaus.plexus.classworlds.launcher.Launcher.mainWithExitCode(Launcher.java:409)
        at org.codehaus.plexus.classworlds.launcher.Launcher.main(Launcher.java:352)
        at org.codehaus.classworlds.Launcher.main(Launcher.java:47)

Where I can I pass the port-number? While I am using localhost, my port-number is 5436 for this database. More generally, what does a rails port mean? Do I need to create a set of tables to match what the data is importing?

I am also trying to use bzcat to pull out an extract of the data so that I could use osm2pgsql.exe but this does not work.

bzcat J:\DATA\OSM\massachusetts.osm.bz2 | J:\osmosis-0.40.1\bin\osmosis.bat --read-xml enableDateParsing=no file= --bounding-box top=42.48 left=-71.31 bottom=42.23 right=42.48 --write-xml file=  | bzip2 > J:\DATA\OSM\extracted.osm.bz2

When I ran this, I got an error message saying that bzip.dll was not on my system. I just saved the file linked on this page and tried running that but it seems not to work.