I have only 454 reads (300~400b) and three paired end 454 library of insert size 3kb,8kb and 20kb. Trying to assemble a genome of expected size 50-100MB. My question is - how should I specify three separate longpaired libray in velvet. Should I just consider them as three shortpaired libraries or may be combination of shortpaired and longpaired ? Any suggestions are welcome.