I want to use Cap3 assembler with Gap4. I contacted Dr. Huang, the author of Cap3. He replied to my request, "A few years ago, the Staden group produced a version of cap3 for use in GAP4 on Unix computers." I searched ftp server of Staden group, but it was not find. I would appreciate for your information that where can I get a version of Cap3 assembler use with Gap4.