Sure, no need to upload the whole source, i just downloaded the zip file from the first post and in main.h changed the line that read return dPriority > COIN * 144 / 250; into : return true;
This patch was proposed by the user Raulo here, and is not mine.
Please dont do that, that changes several other unrelated things that shouldn't be. If you really want the option to more granularly control the fee, please build my better fee ui branch instead. Works much better and doesnt have adverse side effects on other uses of transaction acceptance.
Also, that wont change build results, can you give more information on your build environment?