Here is a copy of a post that I have made at kaitech forums:
I have found that these functions don't work with the Atom:
pause, play, fast forward, fast rewind, mfb-initiated voice dialling (in fact these are all the remote control functions)
These functions do work with the Atom:
volume up and volume down (and this is because they alter the impedance on the headset and not the Atom)
All functions work with a Motorola V3X.
I have just telephoned the retailer who (now) admits that the remote control functions of the R35 do not work with the Atom and that I need to download something called "MSI Blue Player". Would have been nice if he had told me this before. I chose the R35 over the S38 for its remote control functions. I was told by him that the R35 was fully compatible with the Atom. So that's the last time I will buy from them who are shamed here as:
Mr Chan c/o
Mobile Phone Direct Selling Centre
31 Queen's Road Central,
Shop 16, Luk Hoi Tong Building
Central
They are near the Queen's Theatre exit from Central MTR and a couple of shops from SmarTone.
i.Tech have confirmed that the R35 is not compatible with the O2 Atom for music playback with or without MSI Blue Player. Incidentally, I found this free download, installed and ran it but it stops after 30 seconds with an error screen that the program is only for MSI headsets. Thanks again Mr Chan of Mobile Phone Direct Selling Centre!