Importing Midi song files that contain .sysx data

Hi All,
 
A most recent new member here.
 
I am wanting some help with System Exclusive Data and the assignment and configuration of Instrument Definitions with X2 Producer
 
I have been working with a covers show band that users midi backup files for several years now. It confines me to a click track sent to my in-ears, but thats not the problem...As of late our MD who was responsible for all the midi song file arrangements, that i play to has decided to move on leaving the files behind. He was working on a Mac and used Garageband as part of his DAW. I on the other hand use a Pc with a recent purchase of Sonar X2 Pro. My experience with the DAW is little, but i am enjoying this great technology... 
Moreover, i put my hand up to continue working with the files...Its something that i always felt responsible for considering being the Drummer! 
 
Now, because we are adding and changing arrangements to our repertoire and so forth. I have purchased a couple of midi songs online that contain sysx data. When i open the file in X2 Pro a message pops up saying "This file contains system exclusive data designed to be sent automatically to your midi gear. Do you want to send it now?" I click yes then assign TTS-1 as my track mixer and sound. When i go to view/sysx i get banks 0-8191...
UNDER...
Bank 0         Name is Turn general midi systems on...length 6...Auto is ticked...output 1
Bank 1         Name is XG Reset...length 9...Auto is ticked...Output 1
Bank 2         Name is blank...Length 9...Auto is ticked...Output 1
Banks 3-7    Names are blank...Length 10...Auto is ticked...Output 1
Bank 8         Name is blank...Length 9...Auto is ticked...Output 1
Banks 9-127 Names are blanked...Lengths 8...Auto is not ticked...Outputs 1
Banks 128-8191 are empty.
 
Cakewalk do have Yamaha XG .ins which i assign in midi/instruments/preferences. I find that if i assign the outputs of the tracks to Control (VS-100) which is my midi interface... the midi channels, banks and patches all correlate with Yamaha XG as they do in the Instruments/Preferences/Define section...But, how do i get sound when i am using a Novation Impulse 25 midi controller. Its obvious that i must assign the TTS-1 for this, but once i assign the track outputs to TTS-1... I loose XG .
Am i correct in saying that the midi file/s that i purchased were written using XG patches or...? because the TTS-1 with GM2 sounds don't sound as they should...All the patch names slide into their designated tracks, but the sounds aren't correct.
The TTS-1 being a 16 track mixer is perfect for importing midi song files as i can see myself ongoingly purchasing/downloading many more overtime. But what am i doing wrong? Is TTS-1 the only 16 track mixer available in Sonar?
How can i get the TTS-1 to provide sound for XG patches?
 
Plus, trying real hard not to cram so much in my first post-:) but one last thing for now.
 
The song in question fades out in the end and i can't seem to eliminate this. Sysx takes volume control over the TTS-1 decreasing the volume slider as the song ends. In the the Event List...it does allow you to control things like Modulation, Cutoff, Resonance, Pan and Filters. But i see no list for volume control. The decreasing fadeout volume in the file still remains. 
 
Could someone Please lend a hand... Any help would be greatly appreciated and enormous to me! 
 
Thank You!
MrFed
 
 
 
 

Thanks for your kind support and efforts.
I followed your instruction and deleted only the sysex bank channels in the event view...and presto it worked!...The playback didn't fade nor take control of the TTS-1 automatically. 
As you mentioned... an example would be great to view some comparisons.
Cheers