There is a manual install method for Divine Divinity if you can not get the second CD recognized, though there could have been file or folder structure changes when the CDs were updated to v1.34.
Troubleshooting Tips (& manual install procedure)For Beyond Divinity you can to copy 3 files from the 2 CDs (don't need the autorun.inf file) to the same folder on the hard drive and install from there.