Best way to do subtitles for BDP-S370 EU 2010?

I managed to get serviio to burn-in subtitle streams on movies, and it shows up nicely on my 370.
HOWEVER, to make it work I'm restricted to setting it up to always burn-in one particular set of subs. This sometimes gets me the english-for-the-hard-of-hearing, sometimes some odd east-asian language ( and occasionally the sub track I want).
I would very much like to be able to select the subtitle stream to use on-the-fly!
Sometimes I want to watch a movie w/o subtitles, sometimes with them enabled. Sometimes I want to replay a minute or two with subtitles, then and there, while watching most of it w/o any subs.
What would be the best way to do this??? Is it even possible??
HOWEVER, to make it work I'm restricted to setting it up to always burn-in one particular set of subs. This sometimes gets me the english-for-the-hard-of-hearing, sometimes some odd east-asian language ( and occasionally the sub track I want).
I would very much like to be able to select the subtitle stream to use on-the-fly!
Sometimes I want to watch a movie w/o subtitles, sometimes with them enabled. Sometimes I want to replay a minute or two with subtitles, then and there, while watching most of it w/o any subs.
What would be the best way to do this??? Is it even possible??