Importing Question

Hello!

I am currently using a very, very old version of Lifetype for my blog. I desperately need to switch to WordPress because I am experiencing far too many problems with LifeType. My question is: If I use the RSS feed to import my years and years worth of posts, what will happen to all of my comments? Is there a way to import them? Either using RSS or another method? (could I insert them into the database somehow in phpmyadmin?)

Thanks!