Scripted Telesales/Telemarketing Campaigns

Hello,

I'm looking for a way to do scripted telesales/telemarketing campaigns in Zoho CRM. I have seen solutions like GrapeCity Telesales for Salesforce and CallPro CRM and they do exactly what I want to do, but they don't do it with Zoho which is the CRM I would prefer to use due to the pricing structure and the month-to-month payment model. Particularly GrapeCity; they do a great job of this, include prospect scoring and their interface is easy to use. But they are only on Salesforce and the add-on is officially discontinued/no longer supported which is a real problem.

What I need is this:

Be able to setup a list of prospects pulling them from my leads/contacts/accounts
Call Scripting

Be able to setup a call script with questions/answers as well as free flow information capture so that my reps can gather the info from the customers
Scoring of customer responses to enable me to rank their likelihood of buying and rate their potential. (this is a nice to have not a need to have)
branching script steps so that based on their answers, some questions are skipped and/or extra questions are raised

Ability to assign specific telesales reps or a team of reps to the campaign. When the rep comes in, they hit a "Next Prospect" button and are presented with information about the prospect including their buying history. They then place the call (manually or with an autodialer) and are presented with the script/questions to ask the prospect.
Ability to manage the queue of prospects and have a prospect stay in the queue until they are successfully reached or are manually removed from the queue
Ability to re-schedule prospect calls for a particular time (which would take them out of the general queue until that time and/or create a task for the rep to call them at the scheduled date & time)
Ability to confirm and/or edit a prospect's contact details during the call
Ability to schedule follow-up activities, create Potentials/Opportunities and convert Leads directly inside of campaign screens
Reporting to see which prospects are high potentials based on their answers/scores, how many opportunities were generated through the campaign, how successful the campaign was at generating closed business

Does anyone have any experience running scripted telesales campaigns in Zoho CRM? Are there any plugins to Zoho CRM that will add this functionality the same way that GrapeCity adds this functionality to Salesforce? What about Zoho Creator products? Any of those that would do this?

Thanks,

Aslam