Newbie question

[#1]

I have a domain name via Plusnet and I want to use it to point to my wordpress.com website.
How do I do this?

[#2]

Wordpress.com has a page on how to Map a Subdomain.
They also have instuctions to Map an Existing Domain, however, it seems less useful and I don't believe that it's possible with PlusNet (no way to change the nameserver).
To configure the domain from PlusNets side, you'll need to login to the portal and configure the domain via the 'Domain Names' page.

[#3]

I've been on the plusnet domain page but I really have no idea what I need to enter.

[#4]

You'll need to Configure your domain, then Configure DNS records, this is where you add the CNAME entry mentioned in step 1 of the wordpress instructions.
for example: Creating a new DNS record

Left Field	Type	Right Field
blog	CNAME	yourblog.wordpress.com

will result in blog.yourdomain.com going to  yourblog.wordpress.com.

[#5]

I think a trailing dot would be needed on the right hand side of the right field to stop yourdomain.com being added.
Alternatively do you have CGI space with Plusnet where you could install WordPress yourself?

[#6]

Right finally got it to work, didn't realize I had to enable CGI too 
Thanks for your help.