If you can’t get a real high-ID with aMule you can try this trick (in an executable bash script):
#!/bin/sh while :; do amule & # run in background sleep 240 killall amule # or wmctrl -c aMule wait # in case amule needs time to close done
This script close aMule after 240 sec, and then restart aMule, indefinitely, so that his speed remains acceptably high.