Payment Order (multiple) Idocs need to be downloaded into single file

Hello Gurus,

I am able to generate Idocs for Automatic Payment Run in F110 for message type PAYEXT with PEXR2002 idoc type. However, what I found is the system generates one idoc per vendor for a single payment method. So, for example if I run APP for 50 vendors at a time, 50 different idocs are generated and placed in AL11. Currently the requirement is to download the idocs into flat file and upload it in Bank's website. I would like to know is there any way to download all the 50 idocs into a single file (ie a single file containing payment run information for all vendors).

PS: I use CG3Y Tcode to dowload Idoc from AL11 mentioning the directory path but this can allow me to download only one file at a time.

Any Info regarding this would be appreciated.

Thanks in advance,

-Naryanaan-