Email conditions - send email on assignment

I need some very simple vtiger work completed, all related to emails being sent to users when the following occurs, 1: When a new lead is entered by my telemarketers I want an email to be sent to the assigned user (ALSO LEAD CONVERTED TO OPP) 2: When a new opportunity is entered by my telemarketers I want an email to be sent to the assigned user 3: When an appointment is entered into someone calendar or changed in someone calendar I want an email sent to the assigned user 4: When an opportunity is converted to a sales order I want an email sent to the Sale Manager (ME) I can help with email content, just need the work completed, please have VTIGER experience if bidding, no time wasters.