Question Customizing/Skinning Client Portal? Possible?

[WartKelly]

Hey guys, glad to be here.

I was wondering if it's possible to completely customize the client side plesk portal? I'm really only trying to give them access to 3 features: Wordpress Installs, Domain Names, and Billing (might just use WHMCS for that).

So in essence, a really trimmed down customer portal.

Any resources you can share with me?

Thanks guys/gals!
-WC