installing multiple versions of crystal reports

Hello,

Is it possible to install Crystal Reports XI Release 2 and Crystal Reports v14 installed on the same computer?  Will I have any issues?  We are in the process of upgrading another system which requires us to have Crystal Reports v14.  Currently that system uses Crystal Reports XI Release 2.  Until the upgrade is complete, we may need to use both versions of crystal reports.  Is this possible?

Thanks