pairNIC has three options:
1) Custom DNS, you should be able to set up a CNAME to point to whatever you want, I think this option would work for you.
2) URL forwarding, probably not useful for you in this case.
3) Domain Parking, probably also would work for you in this case. Just give it the hostname that you want to park on. It will set up a DNS record for you, creating A records for yourname.com and www.yourname.com both with the same IP address as the hostname you specified. I'd recommend you go with this option if you can. It's the easiest and sounds like the best fit.