Hey.... I have had the same thing bugging my system too. Keeps coming back etc, and none of the ad/spyware killers or Norton seemed to help. It kept loading a new connection called "rst" to my "Network Connections" (Dialup) folder , and would kick me off of my default connection. It was weird because my modem speakers did not indicate any dialing occuring but when I picked up my phone, it was dialing a number (a long and no-doubt expensive number at that). When I unplugged my cord, the dialer asked me if I wanted to try to connect again, and when I clicked "No", the "rst" connection dissapeared from the folder.
So I experimented a bit, and let it dial a few times while watching my task manager. Over 3 attempts of the rst dialer, the process of "jkij.dat", "boef.dat", and "pmfg.dat" were dispayed in "Processes" (individually, not simultaneously). They closed when I chose "no" to reattempt the rst connection (and the connection disappeared from my network connections folder).
*Note: I also noticed when trying to get the dialer to take over that it would always disconnect me from my default connection when a link was opening in a new window, and not when I was just navigating through a site using only one window (some kind of trigger~i don't know)
From there, I did a search on "My computer" for "files containing the word" jkij. I found the .dat and a Prefetch file. When I opened the containing folder for each, the other two names were right below as well. I was so sick of this bloody dialer, that I took the risk and deleted the files (just to the recycle bin so I can restore if things get messed up). After rebooting I checked my connections, and the rst dialer was there but not trying to connect (it was always hidden unless it was trying to dial before), so I deleted that too.
This probably isn't the proper way to do it, so I wouldn't suggest it unless you're willing to take the risk like me (because you're ready to pull your hair out already). I'm sure given a bit more time, the software (Ad-aware, Norton etc.) will figure it out and provide an update.
But I've logged off and on, played on the net etc, for a while, and it seems better. I'll post again if the problem comes back. Sorry for the long untechnical answer; hope this helps.
