Can I set it up so that the program will let me eject both drives at the same time?
Yes, this can be done. You will need to create a batch file that will invoke our software twice (once for the first drive and again for the 2nd drive).
Type in the path to open_cd.exe and the command line options you want (drive letter and open/close command)
For example: c:\cd\open_cd.exe open d
Then type in the same line again, only changing the drive letter to the 2nd drive you want to open/close
For example: c:\cd\open_cd.exe open e
Then save this file with a .bat extension. For example: Open Both Drives.bat
With the example above when you double-click on this newly created batch file, it will attempt to open the d: cd drive and e: cd drive.
On Windows XP, 2000, 2003, Vista, 2008 you can turn on the Quick Launch option for the taskbar. Then you could drag the newly created batch file to the quick launch bar for an easy one-click feature to open both of your drives.
Please Note: If the path to the open_cd.exe program contains spaces, you will have to add " " quotes around the path. For example: "c:\path that contains spaces\open_cd.exe" open d