File Upload in Web Dynpro ABAP not using File Upload UI element

Hi all ,
I have searching for a way to upload a file using the file open dialog ( or even by manually specifying the path/file name) without using the file upload UI Element in ABAP web Dynpro . The  File Upload UI element works for smaller files however with large file sizes 64 MB , the system seems to be running of memory (SYSTEM_NO_ROLL) . This is due to a known fact that the UI element makes a duplicate copy of the whole copy while it does the upload.
I have been looking at the ACFUPDOWNLOAD as a way to solve this problem but cannot seem to figure out how it works , even the sample program  provided  by SAP does not work. I am working with a regular abap server and not kpro( knowledge mananagement provider)  or portal .
Any help would be greatly appreciated.
thanks,
Ali.

If you are on NetWeaver 7.01, you can try both the ACFUpDownload UI element or try creating your own FileUpload in Adobe Flex with Flash Islands.  ACFUpDownload requires the KPRO by default (which is why the same application isn't working for you), but you can write your own handler class to act as the KPRO receiver.  Here is an eLearning on the topic:
https://www.sdn.sap.com/irj/scn/go/portal/prtroot/docs/library/uuid/109b9b52-bc00-2c10-8786-e4c5e96d7e04
and source code:
https://www.sdn.sap.com/irj/scn/go/portal/prtroot/docs/library/uuid/70645070-bb00-2c10-f086-f126721acdb4
If you want an eLearning on the FlashIslands approach, you can find it here as well:
https://www.sdn.sap.com/irj/scn/go/portal/prtroot/docs/library/uuid/50d42644-91ef-2b10-228c-9e0ae75b274e
and Source Code:
https://www.sdn.sap.com/irj/scn/go/portal/prtroot/docs/library/uuid/f044b62c-90ef-2b10-64a6-9ec25294d133
However in both of these approaches you still have to be careful with how you handle large files.  The problem is that they are processed often a single binary string.  This makes the processing easy, but requires total amount of session memory at least as large as the file being uploaded.  In NetWeaver 7.02 ABAP adds the concept of Streams and Locators to help with the partial processing of large files.  This feature doesn't come until later this year, but if you are interested you can learn about it here:
https://www.sdn.sap.com/irj/scn/go/portal/prtroot/docs/library/uuid/80f983df-213e-2c10-ba89-b5a12ef178e8

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