Tried version 1.01 today and it seems to work now!
to answer your questions
yes im on a 64bit system vista when testing 1.0.0, tried the 1.0.0 version on 32bit XP but got the same message. error 113.
my savegame is 4213kb big! using good old 60GB PS3.
but it doesnt matter anymore because Error 113 has been fixed.
What i just did was using the premium '02 R34 GTR V-spec II Nür engine, layout and transmission on a standard '93 Silvia Q's Aero.
i did noticed however that in game it still states that the engine is 2,000cc instead of 2568cc (RB26 of the R34)
it DOES have the power output of a stock R34 GTR V-spec Nur though! if i tune it, it does get alot of extra hp.
it DOESNT say in game it has 4wd (but this might because i havent swapped the LSD's, will have to test that later on.)
So what exactly does the Layout option change? the weight distribution maybe? (is 60-40 now, same as R34, not sure what a stock S14 Q's got)
another thing i found out was that i wasnt able to add a Turbo to the RB26 engine. this might be because the Q's Aero is normally an NA powered car and doesnt have the option to add a turbo.
it still produces 582hp 710Nm without them, should be enough for a drift car:y: especially on 982kg's