NameServers, re-direction accounts info needed?

Hi,
I have a domain name registered with a company in UK. It provides site
re-direction as part of the package, Recently I signed up for an account
with www.together host.com, who said I could use my domain name with the
account if I updated my Nameservers.

At my domain account there is an option to detail the website that my domain
name will be redirected to (usually another free host), would I place the
nameservers (***.freehost.net) that they have given me where I would usually
place the address of the free host (www.myname.freenames.com). Would this
mean I would no longer have a redirection script when my page gets called?

Hope this makes sense?

Darren