If you are considering to use 11g R1 patchset 2 (PS 2) 184.108.40.206.0 then unlike 11g R1 PS1 (220.127.116.11.0), PS2 (18.104.22.168.0) is patch set only.
This means that you can apply it only on existing complete software like 22.214.171.124.0 . For steps on how to apply 11g R1 PS2 on existing 11gR1 Fusion Middleware click here
Below is list of errors which you would hit if you try to install FMW 126.96.36.199.0 directly
INST-07010 Validation of Oracle Home location failed. The location specified does not exist. Enter a valid existing directory
INST-07100 The Oracle Home provided does not contain Oracle WebCenter 188.8.131.52
INST-07293 Middleware home location specified does not have the required Oracle Home installed in it
Things good to know about Oracle FMW 11g R1 PS2 (184.108.40.206.0)
1.Before applying 220.127.116.11.0 to SOA or WebCenter, make sure you have patched Oracle WebLogic Server to 10.3.3 (WebLogic 10.3.3 is 11gR1 PS2 for WebLogic)
2.To upgrade WebLogic to 10.3.3 use smart update (BSU), more information here
3.Some schemas [PORTAL, OID, SOAINFRA..] must be updated in database to bring schemas to 11gR1 PS2 i.e. 18.104.22.168.0. Use Patch Set Assistant (PSA) more information hereto patch schemas
4. If you are running components of the Oracle Enterprise Content Management Suite (Oracle ECM)11g Release 1 (22.214.171.124.0), then do not apply Release 1 (126.96.36.199.0) to your Fusion Middleware environment. The Oracle ECM components that were released with Release 1 (188.8.131.52.0) are not supported in a Release 1 (184.108.40.206.0) Oracle Fusion Middleware environment.
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