The issue here though is you need support for 11gR2 and that data is not currently available to you because it is not yet supported by SMO until the upcoming 3.0.3 release.
Would suggest that you go through the IMT though and verify the SAN and SDU components based on your current host config. Then make the final checks against the SMO perspective as if you were running 11gR1.
If you have questions about using the IMT, let us know.
Also, if you are aware of any special Oracle needs the customer has and perhaps that are specific to new 11gR2 features, please describe those and I can find out whether 3.0.3 will cover them.