Pro CS4 using 100% CPU Constantly

Question

Hi,
I wanted to know if anyone knows if I can limit the usage (for Adobe Premiere Pro CS4 only) - on my CPU usage (as seen in the Task Manager).
I have XP, SP3, 2G RAM, & have reloaded windows recently (this is not a virus or malaware problem, just the program's usage).  And it only occurs with 2 programs (Adobe Premiere Pro CS4 & Blackberry Desktop Manager) which are a heavy draws & therefore makes me not want to use them as much. Whenever I do, the fan is running high constantly & when I look in the Task Manager, it shows the Adobe program for example at: it hovers at around 32,000 K in the "Processes" window in the Task Manager & when using the program it goes to 245,000 K. But still that is not a lot compared to some other programs. Yet it seems to take up 87% or 89% or 90% or 98% or 99% all of the time under "CPU".  And the graph on "Performance" for the Task manager shows 100% the ENTIRE time (no waver).
Now Premiere Pro should use a higher draw & is quite an extensive program, BUT even my professional audio editing/recording software (Pro Tools) & others don't goto 100% at all (let alone constantly); and with Pro - 100% the ENTIRE time with my fan running higher the ENTIRE time seems too much for a computer's health I would think.  And so that's why I was simply wondering (if anyone knows) - HOW CAN I LIMIT THE CPU USAGE FOR JUST "PRO"?!
As always, thank you very much for your help!

Answer 1

If I had any idea "why" Pro does this, I would've have asked my question.  As I said, it is only with Pro (& another program). Other VERY heavy CPU draw programs like (Avid's) Pro Tools (which tracks & edits audio wave files) & is used by every professional engineer & producer (& actually uses up to 1,500,000 K in Mem. usage in the task manager - if using plug-ins) still doesn't draw 100% (like Pr. Pro is)!
And there are also times after I launch Pro (maybe 5+ minutes into it, long after all of my assets are imported again), when Pr. Pro FINALLY goes down to 51% (with the Mem. usage showing 295,000 K).  And then it hovers between 51%-79% for CPU usage from then on while I have Pro open. 
So..  for Anyone who might help on this!
A.  Does your Premiere Pro use about 51-80% CPU usage most often & you hear your fan running higher, & is this normal?   
     [For all I know, you all may say that is also what you encounter & it is normal!]
B.  Any idea why it takes so long for Pro to go down to that 51-80% finally?  (And not all of the times I launch Pro!)
C.  If this is NOT normal (& even 51-80% CPU usage is way to high compared to yours & everyone else's usage), do you have ANY ideas why only this program seems to do this (vs. other very extensive professional programs)?!  And how I might remedy this..
Thank you..