Thanks for the all the responses.

alumbrado: I also picked up the Davies book, with the thought that his lines might serve as a 'stop gap' measure in my repertoire until I had mastered the Kramnik material.  Unfortunately, I just cannot get into the spirit of the Reti move b2-b3.  I'm also not a big fan of letting black play 2...d4. Black looks to get equality through simple and natural moves in lines like these.  I simply can't convince myself that I'm really making black work to negate my '+=' birthright.   

Although, I have to admit I find the 1.Nf3 Nf6 2.c4 g6 3.b4!? line a lot of fun to play.  It just feels a bit naughty to play such a brash QS thrust on move 3.

It took real chutzpah for Reti to play such a thing against Capablanca when most people considered such a move obviously inaccurate (and that Capablanca was just the technician to prove it).  But it paid off...  as it still does over 80 years later. 
BTW, I remember reading that that game (Reti-Capablanca 1924) was the best "advertisement" the hypermodern school ever got.

Thanks again to everyone.

Has anyone else tried to implement the Kramnik repertoire?  Are black players 'booked' as well on these lines?

I have all the books and find most of the repertoire useful.  In particular it is probably the best coverage around of the Symmetrical English with an early(-ish) d4 by White.  The move order issues are quite tricky though.

Nigel Davies' The Dynamic Reti provides a more accessible, less theoretical 1.Nf3 repertoire avoiding transpositions to mainline 1.d4 openings - albeit at the expense in one case of transposing to a 1.e4 opening (the Pirc/Modern via 1.Nf3 d6 2.d4 Nf6 3.Nc3 g6 4.e4 and 1.Nf3 g6 2.e4 Bg7 3.d4 d6 4.Nc3)!  A further advantage - it is just one volume!

If it gets such a high level endorsment as from Khalifman then it's good enough for me.

I only have volume 4 and 5 at the moment.  I'm planning to buy the others soon.  I also plan to put it into Bookup or a similar format for training.  Maybe we could work at opposite ends and share the results?