I think your questions have been answered, so I'll just mention Perfect Effects 8 which has a lot of preset filters which you can alter. This maybe just what you want as you can compare the results directly to the original.
There are quite a few other programs which do similar things such as Nik software, but these cost money. So try out Perfect Effects 8, as you have nothing to lose by doing so.
http://www.ononesoftware.com/products/effects8free/
Harry