cruise control?

I have 2 89 XJ Laredo 4.0 auto 4x4's. One has cruise control and the overhead console with the temp and digital compass. I want to install these into the other 89. Is the cruise control controlled by the PCM or by another module, if by another module, were is it located.Also the over head compass and temp, were can I find the brains for this. My plans are to swap drivetrains and other miscellaneous items. If any one is looking for parts EM me. THe parts XJ is a 2 door, rear was smashed, everything else is in good shape, glass and all.