This is NOT the right place to ask this but I am desperate

Hi all, I know this is not the right group to this but I am desperate. I have just got Apache and I am a total newbie to Apache and to playing with servers, so as u can imagine I am floundering a tad at the mo!! I have set-up and cofig'd apache 2.0.46 on a Windows XP machine on a LAN with ADSL net access.. Now I know the server is working fine as I can interact with it on a command line and it is showing as started on its ickle control panel. Now the problem is that I let the server decide on it's own IP address by leaving Listen in the config file as just a port no of 8080 (80 is already used on this machine), but I have no idea how to actually access the server from a browser as I have no URL or IP to type in!!! Help!! How do I find the IP? Or is there something that I have missed/done wrong/broken? I am sure that this is really simple but at the moment the only simple thing around here is me!! All thought or comments welcome. Thanks, Simon