Happ. I tried the Kenley scenery for you. First of all, it conflicts with Steve McClelland's CFSII Europe mesh. You would need to temporarily deactivate the mesh for Kenley to work. Make sure you installed NovaLib1.bgl to the CFS2\SCENEDB\library\scenery folder. The Kenley folder can be pasted anywhere you wish & activated via the Scenery Library. I had to paste copies of 5 texture files from the Kenley\Texture folder into the CFS2 main texture folder for the trees to display. These are the 4 BMP files named nova066 + VOD62.PAT. Please try it & tell me if that fixed it.
PS. I didn't try any of the missions. I suspect that installing the Kenley scenery could fix your wingmen problem with this campaign.
PPS. Don't forget to edit the Kenley entry in airbases.dat according with the instructions with the campaign.