Specific grouping-Crystal report

Hi,

I'm new to crystal report. I managed to group my report as follows

Group 1- Supplier(ascending)

Group 2 - Item Category(ascending)

Now, I have additional requirement, wherein I want 5 item categories to be shown at last in ascending order. Eg: My Item category is A, B, C...J, out of this I want E,C,I,D,G item category to be shown in last but in ascending.

Group2 should be

A

B

F

H

J

C

D

E

G

I

kindly let me know how to address this.