Adding an A record for your domain or subdomain is simple. Just login to the Lycos Domains admin console, select the domain you want to manage, then click the "website" tab.  From there, click the arrow on the drop down menu where it says <domainaneme> is <dropdown menu>.  Select "advanced" then click "save"

Then select the drop down again and you will see an option to "A record via IP"

Enter your IP and then click save.  Your change should be active within 60 minutes.