Help with the data flow

I have to feed 2 infoobjects master data from one data source. for example: IOBJ1 and IOBJ 2 from DS1. so if i first rn the infopackage for DS1 and bring data into psa and then run iobj1's Dtp, that request will be marked for green and IOBJ2 will get 0 records. i am in 7.3 system, how can i achieve this requirement? please help. thanks.