Importing and merging comments from two Joomla 1.5 websites

Hi,

I am just about to install Komento on my new Joomla 3.2 site, (which has been upgraded and merged from three old Joomla 1.5 sites, two of which had jComments on them) and need to import and MERGE the comments from two of the old Joomla 1.5 websites.

Can this be done please and if so is it as simple as using the import feature twice - once for each old Joomla 1.5 website?

If the two old website jComment importing is successful, I am sure a few of the comment will end up either being connected to the wrong article or to non-existing article because during the process of merging my three old Joomla 1.5 sites into a singe Joomla 3.2 site, some of the article ID numbers were changed. Would it be simply a matter of changing the relevant article ID numbers in the Komento tables in cPanel's phpAdmin please?

Thanks,

Andy