Didn't we just solve this problem for the conn uids? It even does radix-64. We could reuse some of that code to generate unique IDs for the script-land. Robin -- Robin Sommer * Phone +1 (510) 722-6541 * robin at icir.org ICSI/LBNL * Fax +1 (510) 666-2956 * www.icir.org