Client Proxy?????

Hi experts,

Q1. Suppose I’m sending some data from SAP to XI using client proxy? I want to know on which system proxy is generated and how this proxy is executed on R/3. Since R/3 is a different physical machine. As I’ve read in a weblog that proxy is generated on XI and there we will create a program by using SE38 of XI. Once this program is executed we need to log-in into R/3 and there we need to execute the program in SE38 of R/3. How this can be achieved since R/3 is a separate system and we are generating the program in SE30 of XI? Is there any mechanism by which we can send a program to R/3.

Q2. What are configurations steps are required when sending the data from XI to R/3. Please specify the TCODES which are required at XI and as well as R/3 side?

Thanks in Advance

Faisal