I need to display a Crystal report where the header n footer wud be different based on the group of Item IDs....
for eg i have diff item ids from 1 to 4
so for item ids 1 I wud like to hv diff header ..footer n so on till item id 4.....pls let me know how to go about it

You must be using the Group sections right?

So on each header or footer, create a text object and set its value on the bases of your Item Id.
e.g On the header section, create formula that
IF {{ItemID}=1,"Text1.text" Else If ........ (I donnot remember the syntax.)