Paypal Ipn And Form

I need my form modified.

THere are two options at the moment, to pay via paypal or pay later, i want to get rid of pay later, and force user to pay via paypal, only if user pays via paypal will the order be added to dbase and emails from our side will be sent.

When customer returns from paypal, it should display order details, order details page is ready.

Simple project, first bid in budget with good feedback will get project.

Tweaking A Chat Script

I currently have a chat room here http://bit.ly/ao8xl8
What I need doing is instead of a number increase as a person enters I need it so that the Guest would show the last octet of the IP. For instance instead of Guest578 it would show as Guest(Then the last octect of IP). If there are two people with the same octet then I would suggest getting round this by adding a . to one. I would not need any other changes to the script other than that.
If you take a look at the room you will see what I mean.