Two Oracle clients at the same time?

Folks, I have a Windows XP machine that runs a system using ORACLE 9.2.0 database with its corresponding client. Now I have installed a software that needs at least 10g client and will use the same ORACLE 9.2.0 database. The system installed isn't certified for 10g. My question is: can I install 10g client without uninstalling 9.2 client? Can 10g client be used by the new software to read and update the 9.2 database?

Yes, you will install them in separate oracle home. The application needs to use proper path to run correct Oracle client.