Alexander, have you actually tried coding up TimeStop as a global Stun? There are some corner cases you may not be considering. For example, if you summon something during your timestop it will not be held by that initial stun.
You want the English IWD2 DIALOG.TLK? OK, I've put it up. You can get it in ~weimer/bgate/old -- there are some other TLK files there as well.
You wrote me a letter? Email to me tends to disappear -- maybe you should resend it. Anyway, the source to the bg2-]iwd2 converter (called "iwg2" or "weimorph" here) is written in OCaml and is available in the same ZIP as the WeiDU source (since it's built on weidu) -- you can get it from the main webpage. Take a look at the file src\iwg2.ml, for example.