Creating VIEWS (from Oracle To SQL Server)

Cordial greetings,

Again i need help with a couple of issues in migrating from Oracle to SQL Server 2005. I need the equivalent sentence in SQL Server of the following sentence:

CREATE OR REPLACE VIEW IBA_MPDATOSGENERALES AS (
SELECT IBA_MPPROCEDXLOC.IDPROCEDENCIALOCALIZACION, IBA_MPREQUERIMIENTOS.APLAZADOREQ, IBA_MPACCIONESXREQ.FECHAFINALAXR, IBA_USUARIOS.NOMBREUSU
FROM IBA_MPPROCEDXLOC, IBA_MPREQUERIMIENTOS, IBA_MPACCIONESXREQ, IBA_USUARIOS
WHERE IBA_MPPROCEDXLOC.IDPROCEDENCIALOCALIZACION = IBA_MPREQUERIMIENTOS.IDPROCEDENCIALOCALIZACION
AND IBA_MPREQUERIMIENTOS.IDREQUERIMIENTO = IBA_MPACCIONESXREQ.IDREQUERIMIENTO(+)
AND IBA_MPACCIONESXREQ.USERNAME = IBA_USUARIOS.USERNAME
AND IBA_MPACCIONESXREQ.TIPOACCIONAXR = 'S'
AND IBA_MPACCIONESXREQ.CERRADAAXR = 'N'
AND NOT IBA_MPACCIONESXREQ.FECHAFINALAXR IS NULL
UNION
SELECT IBA_MPPROCEDXLOC.IDPROCEDENCIALOCALIZACION, IBA_MPREQUERIMIENTOS.APLAZADOREQ, IBA_MPACCIONESXREQ.FECHAFINALAXR, IBA_USUARIOS.NOMBREUSU
FROM IBA_MPPROCEDXLOC, IBA_MPREQUERIMIENTOS, IBA_MPACCIONESXREQ, IBA_USUARIOS
WHERE IBA_MPPROCEDXLOC.IDPROCEDENCIALOCALIZACION = IBA_MPREQUERIMIENTOS.IDPROCEDENCIALOCALIZACION
AND IBA_MPREQUERIMIENTOS.IDREQUERIMIENTO = IBA_MPACCIONESXREQ.IDREQUERIMIENTO(+)
AND IBA_MPACCIONESXREQ.USERNAME = IBA_USUARIOS.USERNAME
AND IBA_MPACCIONESXREQ.TIPOACCIONAXR = 'N'
AND IBA_MPACCIONESXREQ.CERRADAAXR = 'N'
AND NOT IBA_MPACCIONESXREQ.FECHAPROXEJECUCIONAXR IS NULL
UNION
SELECT IBA_MPPROCEDXLOC.IDPROCEDENCIALOCALIZACION, IBA_MPREQUERIMIENTOS.APLAZADOREQ, IBA_MPACCIONESXREQ.FECHAFINALAXR, IBA_USUARIOS.NOMBREUSU
FROM IBA_MPPROCEDXLOC, IBA_MPREQUERIMIENTOS, IBA_MPACCIONESXREQ, IBA_USUARIOS
WHERE IBA_MPPROCEDXLOC.IDPROCEDENCIALOCALIZACION = IBA_MPREQUERIMIENTOS.IDPROCEDENCIALOCALIZACION
AND IBA_MPREQUERIMIENTOS.IDREQUERIMIENTO = IBA_MPACCIONESXREQ.IDREQUERIMIENTO(+)
AND IBA_MPACCIONESXREQ.USERNAME = IBA_USUARIOS.USERNAME
AND (IBA_MPACCIONESXREQ.CERRADAAXR = 'S'
OR (IBA_MPACCIONESXREQ.CERRADAAXR = 'N' AND ((IBA_MPACCIONESXREQ.TIPOACCIONAXR = 'N' AND IBA_MPACCIONESXREQ.FECHAPROXEJECUCIONAXR IS NULL) OR (IBA_MPACCIONESXREQ.TIPOACCIONAXR = 'S' AND IBA_MPACCIONESXREQ.FECHAFINALAXR IS NULL))))
)

I know that (+) is for outer joins (left or right). I also know that UNION may mean FULL OUTER JOIN. but this query? The real query is a lot more complex, well actually there are just more fields needed from more tables but with this exmple is enough. The bottom line is that i need data from various tables, most of them involved in a JOIN clause. Also check out that in SQL Server doesnt exists the REPLACE word or does it?
Thank you in advance,

Fernando Martinez