Can anyone tell me the easiest route to go about replacing or repairing...
1. abs computer module
2. shift lever module
3. spoiler switch
Somehow mine shorted out.

 

Uhh If you are out of warranty you might want to start looking for used parts.
If you don't find out why it shorted out you will run the risk of ruining your new parts.
You may want to try a local shop that specializes in electrical diagnostic.