So I have my custom domain working fine but I would like and kind of need the full domain (i.e. including www.) to work as opposed to simply htpp://mycustom.domain.com
Do I need to create a second CNAME record?
You could create www as the cname so your custom domain becomes www.domain.com instead. Keep in mind though, if this is your company's domain you would be replacing the main website as well.
For this to work you'd have to first delete the CNAME you have setup already and re-add one to www.
Thanks Travis. I think I'll register a new name first as I am currently using a sub-domain of my main business domain.