Generation of roles from profiles on migration from R/3 4.6c to ECC6.0

Dear All

We have a client who was running R.3 4.6c. He has recently migrated to ECC6.0. The issue is that in 4.6c, they had created profiles and attached to the concerned users without generating roles (guess 4.6c allowed that). Now, the issue is in ECC6.0 we need to have roles corresponding to the profiles consisting of the authorizations of the profile.

Any ideas, how we can generate the roles from these profiles in ECC6.0 without losing the authorizations specified.

Regards

Lokesh Gupta