perhaps this feature has been asking by others, but I dont know.
I wish there is an auto installer script that can run on ispconfig like what fantastico/installatron/softaculous can ran on cpanel/directadmin
Softaculous developer seems very nice and try to make as many as possible script can be installed on various panel.
Other options is simplescript, it's free, hosted installed on their servers but can integrated well with many panel. hopefully ispconfig and simplescript developer can works each others.
below is list of script supported by simplescript