Design matrix web form with CiviCRM table

Question

I am using Civicrm with drupal. Also using civicrm webfrom integration module for registration and/or data capturing requirement.

Now for a specific requirement, I need to develop a matrix kind of form. Means I want to show tabular form on screen. For each row of table there will be certain control which takes input from users and upon form submission (Save button click) it stores a record for each row in table.

Here, target table is from civicrm. I defined an activity with set of certain custom fields, so a new table has been created in civicrm database not in drupal site database, again this table have so many dependency with other civicrm tables.

I have came across certain module to matrix webform functionality but it works with drupal site database not with secondary database (here civicrm database is integrated with drupal).

Use of "views database connector" module provides access to civicrm tables in views but it is not helping with available matrix webform modules.

How this can be achievable? I have very little knowledge of core php.