There is a custom stat called "Set % (x/y)" available in the
Download Warehouse which looks like it should do what you want. It was made for PT3, but should work in PT4 - you need to select the 'PT3 stat files' option from the file type dropdown in the import window (e.g. if you use File > Import Statistic, or import from the Configure > Statistics window).
I don't see one for hitting the flop, but if you can define exactly what you mean by that it should be possible to make.
Check out the
Custom Stats Guide for an overview and the
Tutorial: Custom Reports and Statisticsfor a more in-depth explanation of how to work with custom stats. If you don't know what database fields you want to use please tell us exactly what criteria you want to use to define hitting the flop (and whether it's for cash or tournaments) and we'll point you in the right direction.
For example if you mean making any kind of hand better than a high card then you can just use "NOT cash_hand_player_combinations.flg_f_highcard". (For tournaments replace cash_ with tourney_.) You can see the possible made hand types in Configure > Statistics > $ or T > Hand > Columns > val_f_hand_group for example.