child ranges rollup in GL Accounts

Hi Guys

I need a script to rollup child and grand-child gl_accounts  to parent and grand parent gl_account, e.g if 05000 is a parent os 51000 and 51000 is a parent of 51100

then the amount or expenditure in the last two must rollup to 05000

and i also net a script to generate/calculate sick leave net entitlement and capped leave net entitlement "Credit"

Thanks and Regards

Mpho