Membership addon integration

Hi,

We have a number of existing cms installations and are looking to integrate some of the functionality of the membership addon into one of them. Our main objective is to provide a secure method of allowing clients to retrieve their login details automatically from a web link rather than having to email us for them which can create a delay if they request them over a weekend. How easily can we integrate the membership addon into an existing cms installation and will it allow access to all the existing users login details if requested without having to recreate all the accounts.

We are shortly expecting to perform a cosmetic rewrite of the site in question but will be looking to retain the existing cms facilities, accounts and data so it is important that we can provide this functionality without having to re-create all the existing accounts.

As we already heavily subsidise this particular site we are looking to provide the facility within the budget associated with a Membership addon but need to know it is possible before commiting further.

Thanks in advance