SuSEFirewall2 and IPTABLES Question

Dear List, I built an own Firewall with IPTABLES (I inserted every Rule myself) and I want now change to SuSEFirewall2. My Questions are, 1. Would you change to SuSEFirewall2 or would you act like the slogan says "Never touch a running System!"? 2. I've inserted a rule to only let connections into my network if they belong to a parent connection like: Now my Question: Does SuSEFIREWALL2 offer this Feature and how can it be activated? What do you think about this rule? Is it usefull or garbish? Sysinfo: kernel: 2.4.17 SuSE: 7.2 iptables: 1.2.2 Ciao ;-) Robert - DE