it is possible to do that but you would have to do it with automation clips as far as i know and you would have to automate the whole track tempo, or you would just have to place the notes in more spaced apart when you program them in... to automate the tempo, highlight a small area in your playlist right click the bpm box and select create automation clip, at 75bpm, it should draw a line in the bottom part of your playlist, whenever the track plays that line it will put the tempo to 75bpm, you can copy and paste it just like a pattern now, do the same but with the tempo at 90 and whenever it hits that line the tempo will change to 90bpm for example.. place them as desired in your track.

For the fpc question yes, load an empty fpc, from Generators > FPC > Default then drag the snare/kick/hi hat sounds onto seperate pads to load them into the piano roll, what pad you drag it to will choose what note in piano roll triggers it.  Alternatively you can click on the program and there is a remane option where you can rename the notes to words like 'snare' etc.. make sure you click the button saying 'abc' first tho