Okay, here's how you should be able to fix launcher issues under Win8.
In the folder where you installed FS2 into, right-click on FreeSpace2.exe and select run as admin. Click yourself through the dialog prompts and select Setup. Run detect available cards and select 32-bit 1024x768, on the Speed tab select very high. Then close the program by clicking ok and quit. This should write all the necessary registry entries that may be missing.
Launcher 5.5g is not Windows 8 compatible so it can be deleted if you still have it. Use wxLauncher instead. In your Start-menu there should be a shortcut for wxLauncher, please right-click on it and select run as admin. Set your settings the way you would like them to and click play. After this, there should be no need to run as an admin even if you want to change settings or your mod.
Both mods not being displayed in wxLauncher and mods generating errors means you have not installed them correctly. Please follow instructions in the link below so we can help you.
http://www.hard-light.net/forums/index.php?topic=56279.msg1180359#msg1180359
Here's the debug file:
==========================================================================
DEBUG SPEW: No debug_filter.cfg found, so only general, error, and warning
categories can be shown and no debug_filter.cfg info will be saved.
==========================================================================
FreeSpace 2 Open version: 3.7.0.9755
Passed cmdline options:
-3dshockwave
-soft_particles
-post_process
-no_vsync
-3dwarp
-ship_choice_3d
-weapon_choice_3d
-mod fsport-mediavps,fsport,mediavps_3612
-window
Building file index...
Found root pack 'C:\Games\Freespace 2\fsport-mediavps\mv_fsport.vp' with a checksum of 0xeb1fe49a
Found root pack 'C:\Games\Freespace 2\fsport-mediavps\mv_fsport_music.vp' with a checksum of 0xeb795f15
Found root pack 'C:\Games\Freespace 2\fsport\fsport-missions.vp' with a checksum of 0x0e155670
Found root pack 'C:\Games\Freespace 2\fsport\fsport3_4.vp' with a checksum of 0x27404416
Found root pack 'C:\Games\Freespace 2\fsport\odeon_fs1.vp' with a checksum of 0x9db5a4ac
Found root pack 'C:\Games\Freespace 2\fsport\sparky_hi_fs1.vp' with a checksum of 0x9548edb1
Found root pack 'C:\Games\Freespace 2\fsport\stu_fs1.vp' with a checksum of 0x033f612f
Found root pack 'C:\Games\Freespace 2\fsport\tango_fs1.vp' with a checksum of 0x69946372
Found root pack 'C:\Games\Freespace 2\fsport\tango_hi1_fs1.vp' with a checksum of 0x110c971c
Found root pack 'C:\Games\Freespace 2\fsport\tango_hi2_fs1.vp' with a checksum of 0xe3c8d13b
Found root pack 'C:\Games\Freespace 2\fsport\tango_hi3_fs1.vp' with a checksum of 0x5ddd28f7
Found root pack 'C:\Games\Freespace 2\fsport\tango_hi4_fs1.vp' with a checksum of 0x52d85c46
Found root pack 'C:\Games\Freespace 2\fsport\tango_hi5_fs1.vp' with a checksum of 0xf615f6be
Found root pack 'C:\Games\Freespace 2\fsport\warble_fs1.vp' with a checksum of 0x0b608285
Found root pack 'C:\Games\Freespace 2\mediavps_3612\MV_Advanced.vp' with a checksum of 0x4b8b0f5a
Found root pack 'C:\Games\Freespace 2\mediavps_3612\MV_AnimGlows.vp' with a checksum of 0x6a554026
Found root pack 'C:\Games\Freespace 2\mediavps_3612\MV_Assets.3612.vp' with a checksum of 0x59649c21
Found root pack 'C:\Games\Freespace 2\mediavps_3612\MV_Assets.vp' with a checksum of 0x529cc70f
Found root pack 'C:\Games\Freespace 2\mediavps_3612\MV_Effects.3612.vp' with a checksum of 0x9c510aa0
Found root pack 'C:\Games\Freespace 2\mediavps_3612\MV_Effects.vp' with a checksum of 0xb9a9a485
Found root pack 'C:\Games\Freespace 2\mediavps_3612\MV_Music.vp' with a checksum of 0xb3e21469
ASSERTION: "max_size > header_offset" at cfile.cpp:1734
max_size (0) > header_offset in packfile C:\Games\Freespace 2\mediavps_3612\MV_RadarIcons.vp
Int3(): From c:\code\fs2_open_3_7_0\code\globalincs\windebug.cpp at line 1040