Ok, im not really sure how i can explain this but i'll try

i have several websites
mini-companies.com
visionlandscapes.ie
techinfo-4u.com

now the thing is mini-companies.com is my main domain, and its published from the public_html folder as it was the first domain name i bought

when i bought my other 2 domains i added them as sub-domains and they are published from folders within public_html
Was this the right thing to do?

why i wonder is because i can access these by entering
techinfo-4u.mini-companies.com and visionlandscapes.mini-companies.com
into the address bar and i dont want this if possible as mini-companies.com has nothing to do with them

I also plan to cancel my mini-companies domain name when its expired but i want to keep techinfo-4u.com and visionlandscapes.ie
How can i set one of these as my main domain?

Thanks and hope i've made some sense, if not feel free to ask me some more questions

Thanks again

__________________
robobobo
www.techinfo-4u.com
www.visionlandscapes.ie
www.twitter.com/techinfo4u