Speedpassion update HW box...help

[chunkerluv]

Hi I have a SP LPF GT2.0 esc running a SP 7.5t in 4wd buggy. I have run the software that came on it which has boost, timimg ect (stock???) and temps are fine on the small track I run on. I've bought a HW 2 in 1 program box to play with the settings as I switch from slippy clay to high grip carpet so need to adjust.
My questions are...
1. what software/firmware to put on the speedo HW or SP and what versions do I need
2. Am I ok to run stock on 7.5t or should I run mod. If stock what should I not do ie. don't adjust timing more than ......
3. How the hell do I do the above....LOL

Thanks for your help much appreciated.