i will not be posting his IP address here. If however member number 993 gives me his consent on these forums, i will gladly send a private message with his IP. I'm not about to do that until he specifically consents though, and i suspect he won't.
The [img] thing should be viable, just put an image in yr sig (a 1x1 pixel one even) and when he posts, you'll know he's online, and will be at that IP until he goes offline again. There must be a workaround for your situation...
still, as i say, if XP user consents to me handing out IPs, i may do so on the PMs, and it's possible he may be cocky enough to consent, since you, me and him are unlikely to be online all at one time, and the IP would need to change hands mucho fast to get to you before he went offline i suspect...
Also, he may not believe you can do anything nasty even if you do have his IP, and may give consent just to prove it.
It all depends on whether XP User wants to prove that windows XP is secure even when the intruder knows the IP address (and this should be the case, a random hack would use a random IP address, if the IP happened to be yours, you would need to be secure to fend it off...