Fedora Hardware :: Headset With Single Connection - Use The Mic?

I've got an MSI U123 netbook that has a built-in web-cam and mic. It has a fairly stock install of Fedora 13 on it. I'm trying to get Skype working and everything seems OK so far, except when I did the test call the playback of my voice was very low. I played around with a few settings and got a little bit better results, but still not acceptable. However, I also tried booting the netbook to Windows XP and tried Skype there. The results were a little better, but still not great. So, I'm thinking rather than a settings change the built-in mic probably just isn't going to cut it.

I've got a couple of headsets that have microphones that I've previously used with portable/cell phones. Both of these headsets have just one line that I'd typically connect to the headphone jack of a phone. Can this type of headset be used with my netbook, by connecting to either the headphone or mic-in jack, or do I need either a USB headset or a headset that has two lines (mic/headphone)? If my type of headset will work is there any type of "How To" doc on what needs to be set? I'm assuming I have to toggle some capture/mic/line settings. I haven't tried anything yet, but rather than mess around with a lot of settings and start banging my head against the wall I'd ask if this is even doable.