Import Wizard backup

Hi exports ,

iam using sap bo 3.1

I  Just taken back up from my PROD server through import wizard  ,back up size was 20GB and files where slip-ted  in to (1biar(512mb),2biar(512mb),3Biar(512mb))..........42biar(512mb)

Now i want to insert the back  to development severer

Query:  source is BIAR and destination sap 3.1 (Dev),, now all biar files will be taken automatically are ,i want to write any code

if code is required plz help me in step by step

Thanks,

raghunath