There should not be a problem.
At the time of placing order, on step 1 - Choose Domain page, please select third option "I will use my existing domain and update my name servers".
Please note you will require changing name servers to:
ns1.temok.com
ns2.temok.com
ns3.temok.com
Or to DNS records (in your domain registrar control panel) to our cpanel server hosting your website.