been testing both versions out (ZAP 3 & Sygate 5).
Both have good & bad points. ZAP seems to be a little easier to manage as far as permissions go (but could be cause I'm used to it more, even if it doesn't look like older versions), while Sygate blocks better, but to update winXP the website won't let me, saying I need windows installed or some other kind of error message. I've tried disabling a few things under options & advanced, but still the same errors (even with allow all), until I just completely shut down Sygate.
Perhaps there are still some settings I need to change, but ZAP doesn't give me that problem.
But this also tells us Sygate does protect better.
Anyhow, will try testing some more & post any updates & workarounds I find (when time permits). I haven't had the problems others on winXP have had with ZAP, so on my system it seems to be working ok.