WTF I FINALLY GOT THE BOOTLOADER TO BOOT DIIFF SCREENPACKS!!!!!!!!!!!!
here is how I did it instead of editing a menulaunch file I opened up the xbox renamer app
clicked on launch file creator in the renamer copied this text into it
#!/static/ash
sleep 7
./mugen -r mkp&
sleep 1
./joy2key1 103 106 108 105 28 1 30 31 32 33 34 35 29 59 119 62 36 61 2 4&
./joy2key2 8 9 10 11 96 1 44 45 46 47 48 49 97 60 62 119 50 61 3 5&
# Here's the default order for buttons with joy2key
# ./joy2key (Dpad up) (Dpad right) (Dpad down) (Dpad left) (Start) (Back) (A) (X) (

(Y) (Black) (White) (L3) (R3) (Right analog up) (Right analog right) (Right analog down) (Right analog left) (L trigger) (R trigger)
saved it to a menulaunch file
menulaunch9 since I used that one ftped that menulaunch file over to my existeng xmugen screenpack booters menu folder and replaced the old one with the new menulaunch9 file
on my xbox and also put the 4 menu files into my mkp folder in the data folder
menu9.gz
menulaunch9
mugenpak9.cfg
mugenpak9.xbe
remember to use the menulaunch files you used to setup the screenpack
I have done this for the EVE Battle and DC vs Marvel and mujen fighting jam Screenpacks with this method and I CONFIRM this method to work so if you are able to boot a screenpack via r1sky's or the bootloader if you configure tha main mugen.cfg file in the data folder to only boot that screenpack this will work
I hope this method will work for you also
if you wanted to use eve battle screenpack to boot up you would use ./mugen -r eve&