Hi...
the path problem can be fixed adding a dot to the end path.
anyway, keep in mind that UnRAR v3.x series need a lot more memory the oldest ones,(specially to decompress text), due the new compression algorithm..
try to use the version I have uploaded just now to my website. it is the v3.20 (non-beta) compiled without ixemul, but I assume you still need more memory...
Kind Regards.