hello everyone
Can we install coreldraw x5 as well as x6 on a system & use them one by one?
Yes you can use both versions simultaneously. The only point to remember here is lower version should be installed first.
You can install two versions and they will largely work independently because each has its own default path, data and registry keys. In this respect CorelDraw is better than many other programs which try to throw both versions in one place.
You will be able to use both versions for most things, but there are some things to remember ... those I can think of offhand ...