Hello,

Actually you can create your own script for that using our API. Please see following example for creating a forum group, forum and post:

using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;


using CMS.Forums;
using CMS.CMSHelper;


public partial class CMSTemplates_CorporateSiteAspx_testDominikPForum : System.Web.UI.Page
{
    protected void Page_Load(object sender, EventArgs e)
    {
        // Create new forum group
        ForumGroupInfo fgi = new ForumGroupInfo();

        // Set properties
        fgi.GroupDisplayName = "My group";
        fgi.GroupName = "MyGroup";
        fgi.GroupSiteID = CMSContext.CurrentSiteID;

        // Insert into database
        ForumGroupInfoProvider.SetForumGroupInfo(fgi);

        // Create new forum
        ForumInfo fi = new ForumInfo();

        // Set properties
        fi.ForumGroupID = fgi.GroupID;
        fi.ForumName = "MyForum";
        fi.ForumDisplayName = "My forum";
        fi.ForumModerated = false;
        fi.ForumSiteID = fgi.GroupSiteID;
        fi.ForumOpen = true;
        fi.ForumAccess = 0;
        fi.ForumThreads = 0;
        fi.ForumPosts = 0;

        // Insert in database
        ForumInfoProvider.SetForumInfo(fi);

        // Create new post
        ForumPostInfo fpi = new ForumPostInfo();

        // Set properties
        fpi.PostForumID = fi.ForumID;
        fpi.PostSubject = "Some subject";
        fpi.PostUserName = CMSContext.CurrentUser.UserName;
        fpi.PostTime = DateTime.Now;
        fpi.PostApproved = true;


        // Update database
        ForumPostInfoProvider.SetForumPostInfo(fpi);
    }
}

Please note that you will need to import users as well (or use preexisting one) - in terms of each post needs to be connected with appropriate user.

Please more details about our API: http://devnet.kentico.com/downloads/kenticocms_api.zip

Best Regards
Ondrej Vasil