http://bugs.winehq.org/show_bug.cgi?id=25189
--- Comment #9 from Nikolay Sivov bunglehead@gmail.com 2012-11-24 13:03:18 CST --- I guess what's important is what happens before:
--- err:msi:ITERATE_Actions Execution halted, action L"InstallFinalize" returned 1603 ---
so +relay will show something hopefully. Also you could try with 32bit prefix to see if it makes any difference.