I have PM'd Nole but I would like to add that while there are countless threads (here and at flyer.co.uk and other places) on the FAA PPL/IR route, a lot of the info in them is very wrong.
I am doing this route myself now and while there are certain very specific people posting here and elsewhere who I just happen to know are up to date, a lot of the rest of the info isn't of much value.
And that's before one gets to the (few) people posting here who make what appear to be deliberately misleading statements e.g. claiming that the CAA is about to clamp down on FAA licenses or aircraft, etc, etc.
If one wants to do the lot in the USA, then you (supposedly) get a VISA and s0d off to Florida for a couple of months and do the lot there. That is the simplest way to do it - if you can find the time away.
It is the UK route which is more complicated, and doubly so if one wants to do it in a G-reg plane, or in a G-reg plane initially which will go N-reg later...