Delfi, what your asking isn't any trivial thing, especially given what you have provided. Some questions follow:

Can you name the exact C/C++ files that you specifically need converted?
Are you sure you have the exports proper for the methods you are calling?
Can you give a SIMPLE sample that doesn't require hacking another project?
* 2D top down a rectangle that "drives" around and shows what your looking for. As simple as you can make it.

Update your RAR to include the latest source you have. No sense in us having to re-work your work by having to read/patch every reply.

If that seems like too much to ask, then put your request on any of the bounty sites and see what happens. You might also try some of the Borland (sorry, Code Gear) News Groups.