ADSL Problem

Can somebody help me with my problem on setting up my linksys router. Let me start from the start.
I have ADSL internet connection. when I want to connect to internet I must go to webportal of my ISP then I will input my user name and password. the problem is I want to share this internet connection using my Linksys BEFSR41 Router to my network. but my router only have a 6 type of Internet Connection (Static, PPPoE, RAS, PPTP, Heartbeat Signal and L2TP) I already tried PPoE but it doesnt work because of the Portal which will appear when im going to internet. What should I use on that Internet connection type. and can you teach me how to configure it. Thanks