The Dede IMS platform is mostly dofollow, it has auto approve urls, for which I give you the list. Guestbooks are only 1 per domain, so you would need to build links over a period of multiple days in order to get links on different urls (if building links to the same url). No doubt this would be helpful as others will place links and then build links to it.
Also you will need captcha solving. Captcha Sniper and GSA Captcha Breaker will work for Dede IMS.