The only way to be sure is to try each app as you go. In my experience, a good 85% of installable cds will work from a straight HDD copy. There are other ways around stubborn apps, of course, such as virtual cd/dvd drives, which should give you about a 95% chance of a useable copy.
There will always be the odd one or two which will, (and I say thie reservedly, but legally), never work in this fashion.
Bests,
Giz