[Found while we wait for Yomatools to be fully compatible - mine worked others didn't]
that creating a shortcut with beaucoup @ folders wasn't possible

solution: create a batch file

in Notepad type

@echo off
cd C:\Program Files\Bohemia Interactive\ARMA 2    [or other root to your game]
start arma2oa.exe -nosplash -mod=@cba;@ace;@acex;@ace_sm;@arma2ts   [etc,etc]

make sure the last @modfolder does not have a semi-colon [;] at the end
you can create your modset list in yoma and copy n' paste

save as 'arma2oa.bat' on your desktop and away you go !
save as type 'all files' so as not to be a .txt file

NOTE: if your game is on a seperate HardDrive to C: you need to assign it first. Example

@echo off
cd /D E:
cd E:\ARMA2