[otrs] Receiving emails via POP3 accounts

I have installed OTRS 2.0.4 on a Windows platform. In our environment, we have an Exchange 2003 server which collects emails from POP3 accounts at an ISP. In OTRS, I have configured some POP3 accounts via the admin interface (PostMaster POP3 Account). Now I am ready to collect mails (either from the Exchange server or ISP), but I don't know how! I've read that one can manually execute "./bin/PostMasterPOP3.pl" or setup a cron job for "var/cron/postmaster_pop3.dist", but in a Windows environment, I don't know how to do this. I would really appreciate your feedback - I am totally new to OTRS - please go easy with me ;O)