I've done it, now got Sport Plus. There's also a Comfort Plus but this doesn't work because there's no Comfort Individual menu, to customise. Sport Plus is on my iDrive now, so I have engine sport plus and transmission sport plus options.
When I try them tomorrow I'll post what each setting is like and what they're both like when set to sport plus. The engine sport plus is interesting, I wonder if it will change the exhaust sound........... Tomorrow