It is perfectly doable and in fact it is one of the good practice for large scale deployments. I have just implemented the CRS cloning (10gR2 RAC) for a customer (for large scale RAC deployments ) using a mixture of OUI , cloing and silent install scripts. I know few customers who deploy oracle as a package (install like a redhat RPM) and living happily with that.
Bottom line: It is technically possible and supported. However I would raise an SR and get an official blessings from OWS .
I proposed a plan to make a good working Oracle home(with all the patches installed) and making an image and using the same image for all other nodes with the same platform and hardware. The process is tar, untar them and to run clone.pl for the home on target node. This saves us lot of time(for installing 10g R2 using OUI). But my teammates are not okay with that stating that it may get us some problems. We have already cloned it for multiple boxes and ZERO issues. But still people are afraid to put that home in prod.
Thanks -- "Happy people plan actions, they don't plan results." -- http://www.freelists.org/webpage/oracle-l
-- Best Regards, K Gopalakrishnan Co-Author: Oracle Wait Interface, Oracle Press 2004 http://www.amazon.com/exec/obidos/tg/detail/-/007222729X/
Coming Soon... Oracle 10g RAC Handbook, Oracle Press 2006 http://www.amazon.com/gp/product/007146509X/