sap script request (urgent) ASAP

hi all

see if i got a request no sa1000to of a print prgram to modify the particular print program .

then what should be my approach that how can i make modification by having a request no. only.

plz give me the steps i have to follow for this.

and also tell me

2.that whethere after modification i have to go for new request to save it or i can save in the older reqest provided to me. if in new reqest i have to save then how it is done?

thanks to all in advance

i will surely give points to u for ur effort