HOW TO ADD FIELDS TO INFOTYPES? URGENT PLEASE

Hi gurus,

I have got the chance to create TECHNICAL DESIGN for BW REPORTING. some of the fields are available in CUBE LEVEL but not in the R/3 SIDE respected infotypes. could you please tell me the procedure to add NEW FIELDS TO THE INFOTYPES?

the fields to add: 0AGE_RANGE, 0COUNTRY_CODE, 0GENDER, 0PAYPCT, 0AGE_KYF and 0HDCNT_LAST.

thanks in advance

devineni