Downgrading from vb4 to vb3 using Impex Query

[m002.p]

Hello,

I read the following tutorial:

https://vborg.vbsupport.ru/showthread.php?t=255104

This worked well but I have a few questions about Impex when used in this format.

Let me explain my situation.

I have created two folders on my web server called 'forum' - vb4 & 'forums' - vb3. Both have their own databases vb4 and vb3 being my latest backup in this version of vbulletin.

My general problem was I did NOT backup before upgrading to vb4. My last backup of vb3 was a few months old too so I want to now transfer all the up to date posts, threads, users etc from the vb4 forum to the old backup of vb3.

When I used the linked tutorial above before, it put prefixes on my imported usergroups, users etc. This is no use to me as I have 1000s of members and I do not want to rename manually same with usergroups. So using Impex, can I simply overwrite any exact matches instead of create duplicates with prefixes?

Or is there a better way of just updating my outdated vb3 forum with the latest info etc from the vb4 forum?

Any help appreciated

Matt