How would you transfer your domain into a website builder?

[livewyre]

Your request is reasonably simple - you want to point your domain at webs.com - there is probably no need for me to try and promote a different hosting site within my answer is there?
OK, and the answer...
You can probably find out all you need to now from webs.com themselves - you will need to tell them the domain that you want to use (so they know which folder/server to point it at), and you will need to know the name of the 'nameservers' that they are using.
Then you go to your domain reg company (and hopefully they include a helpful dashboard for your account) and simply enter the nameservers in the right part of the DNS settings.
If you are using GoDaddy or 1and1, then I have guides for each on the link below, other domain reg companies will work in a very similar way I would imagine.
(there are other ways to do it as the link explains, but nameservers is the best method, scroll to the bottom of the article for the lnks to the GoDaddy/1and1 instructions)
If your domain is registered as part of a hosting deal then it may be tricky to turn your account into domain reg only - if they give you any problems, request the code for moving your domain to another registrar (they are obliged to provide this) and simply move your domain to a more accomodating registrar...
Hope this helps