Some of our modules made use of Oracle graphics in the 6i version (C/S). We spent some time thinking about installing Graphics on 10g but eventually we opted for the BI bean instead. Why ? very simple because you can easily duplicate what you have in 6i with very nice features from the BI bean.
There might be a slight learning curve here but it really boils down to reading the instructions that come with the BI bean and some testing. That’s all.
Note: make sure you set your classpath to the folder where you have your JARs.