Thanks guys for the quick response.
Ipstenu, Thanks for pointing me towards the multi-network plugin. That plugin definitely needs to come with a warning. I used it and completely messed up my sites. I couldn’t log back into the admin console. I had to do a complete re-install of wordpress. This option is therefore out for me, but I think is a good one for people who know how to use it ??
sonnycool, Yes, that was what I was thinking to do originally, but was looking for a cleaner solution. But in the end, that is what I ended up doing. I did a WP install in the main folder, then a WP with MP install in the sub-folder. It’s working now.
I’m marking this topic as resolved.