What is your platform/os?
RAC or Stand Alone?
Pl post exact versions of "10g" and "11g". All of your functionality should work as expected. This should be tested and validated in an environment as close to production as possible, before performing the production upgrade.
See MOS Doc 870814.1
I think you can use below, but I recommend you to look into official upgrade documents and as Srini said, should use 188.8.131.52 with the latest PSU
I need to repeat myself (just mentioned in another thread in two mins before).
Best source out there for your needs is MOS document "Oracle 11gR2 Upgrade Companion (Doc ID 785351.1)" IMHO. Check it.
Best practices, behavioral changes, patch recommendations... all you need...in one. Just like head and shoulders ha.