How transfer Purchase request from ECC 6.4 EHP4 to SRM release 7.0 EHP1

Hi Experts,

I,ve got a problem,  we have a SRM 7.0 EHP 1 and a ECC 6.0 EHP 4 system with PI and we need transfer the purchase request from ECC to SRM so we are  implement ME-REQ-SOURCING-CUST and CPPR, there are any other way to transfer the purchase request to SRM apart this badi and CPPR  or not? I see one reports call  BBP_EXTREQ_TRANSFER  ¿Can we use it wth my release? and in this case ¿It´s wiith PI or without?

Thanks by advance

Best Regards,

Mar