restoring previous version of script

hi guyz

need to know, is there any means of restoring earlier version of SAP SCRIPT. as in reports, we can restore one object to its earlier version, in the same way is there any means of restoring SCRIPT to its earlier version? i know basis guyz can delete the curent request from the import queue. but i do not want that. without basis interference, i want to know any means of doing it.

thanks

shane