GL Account number allocation and Account group

Hi,

Please help me out how to segragate GL a/c Nos and the Account grouping.

Shall we have only Four group as

Liabilities- 100000-199999

Assets - 200000 -299999

Expenses - 300000- 399999

Revenues - 400000-499999

Pls advice on the Account groups inside... Also I need all items should be displayed in the B/S.

Thnx