SamyGO

It is just standard program. W don't have step-by-step guide for all programs. Do you read yout TV manual to how to run programs from USB? Or Do you looked our Wiki pages? It's really easy. Try to make it. After your success, If you request, I will give wiki edit permission to you for create 'such' a page to how to use/install applications on TV if you cannot find it on wiki. (I think my last sentence is not correct grammatically, due use of too much 'to' )

I think it's problem on your TV. Since every TV is different slightly, there could be such problems...
If a program doesn't work from content library, than it will don't work from other interfaces. Don't try...

What is the error log of DCA? They needed to be in /dtv/ directory?