To perform CRM data migration from Salesforce CRM Professional or Group editions you should create a backup file of all your data in .CSV (or any others formats). Contact our account manager to get more info about Salesforce Professional and Salesforce Group Migration.
Trujay.Migration can move all your data (with custom modules and fields) to your desire CRM securely and with relations modules. The process turns to be secure and accurate.
Please note: an automated migration is not supported due to the API CRM limits in those Salesforce editions.