I have found a little error in your readme.txt file :
I think that LOAD:RRSKYPE.skin must to be replaced by LOAD;RRSKYPE.skin
Goto line 77 of the Exectlb.ini file in the carwings folder.
Choose one of the empty MyAppXX to use (usually MyApp22 is free) and change it to "MyAppxx","LOAD:RRSKYPE.skin"
(usually MyApp22 is free so it would be "MyApp22","LOAD:RRSKYPE.skin").
Now look at line 75 and change the details to give a name to your chosen MyApp (RRSkype would be good).
Now open carwings and pick a button to use. Keep it clicked down until the app chooser skin is shown.
Then find the app name you used earlier i.e. RRSkype and select.
I have make a Skype skin for the Carwings_Dynamic_lite skin .
It is not perfect , surely . If somebody want to test it and give me feed back ?