cookies?

i wish to POST submit to a login form on another server and then after that POST some more information on the resulting page. the thing is, after the first login, the website sends me a cookie. it probably holds the session id and or authentication information. how will can i relay this back to the page so i can view the resulting page without being kicked out because of no cookie?? ive already used curl and am able to post things to scripts. but this cookie problem i dont know how to get around. any idea? cheers