Cheers atyss & cowsy (if I may call you that 
-As you guessed, I'm not too big a fan of 'that' OS,...
I started my masters working on SG's/IRIX which I found much less painfull than the M$ OS t switch to.
I'm hopefully going over to OSX shortly (MAYA!!!), and may well run Linux on the AMD box I have from then to escape Bill and friends 
I do use PS's Automate>Batch at present (or similar in GraphicConverter, a brilliant shareware from Thorsten Lemke)
....but find with big renders it's a drag passing it all across my LAN, just to convert.
As for the conversion plugin cowsy mentions,...I'll take a look for it, I occasionally use the Soft2Tiff etc. stand-alones, but find the 'shell's syntax etc. a pain to use.
Cheers again 