Hi, Does ns-allinone-2.1b5a include version 2.1b5 patch? if we install ns-allinone-2.1b5a, we needn't any patch. thanks *********************************** Fu ChengPeng The Chinese University of Hong Kong Information Engineering Dept. Shatin, New Territories, Hong Kong Tel No. 00852-26098367 (o) 00852-26035737 (d) Fax No. 00852-26035032 ***********************************