downloading the links from http://www.oracle.com/technetwork/middleware/soasuite/learnmore/vmsoa-172279.html
i've checked the first oel6-64bit-soasuite-11gr1-ps6-otn.ova.7z.001 using md5sums it checks ok but i have not been able to open it using winzip/winrar/7zip the all give errors:
7z: Can not open file as archive
Winzip: cannot open. it does not appear to be a valid archive.
winrar: the arcchive is corrupt
anyone has been able to download and install it?
I think you have misinterpreted the instructions.
Read them again, and also save a copy of the additional PDF README that's linked on that page you referenced in your post.
You don't open each individual file.
You download all six files ( .001 through .006) and place all 12GB+ of them into the same location.
Only after you have done that can you then invoke the 7zip utility onto the .001 file, which will unpack and concatenate them into a single result.