Thanks for your response. (Sorry, I don't know how to quote ony part of your reply in the forum...)
The problem I have with bomb release is that if I press and release, I am getting more than one bomb released if I hold it pressed a little too long.. it should register only one press and wait for "button up" trigger before releasing another bomb.
The GS problem isn't solved with 0 wind, because if I am in a 40° nose down flight path, my groundspeed is a lot less (the cosine of the dive angle) or explained differently: if I am in a straight down dive my groundspeed is 0, but my airspeed is not. (To be honest: haven't checked if the T-45's HUD follows this logic. I just checked, GS goes to 0 when vertical up or down.)
A friend of mine is going to try DCS tonight, gave him the link to this MOD. With Rudel_chw's great tutorial missions he'll be up to speed quickly enough!