An attempt to push my system any further

I was looking into some console commands for wow and I noticed those that let you set fps for main and background screens.

If I would, for example, set one to 1 or 2 fps for the background windows, would that affect the casting time of dps and healing spells? So if the healer runs at 1fps and I hit my heal key, will it still cast instantly or will there be a lag?

Stupid question maybe but I`m thinking of saving another month for a good new computer while meanwhile starting to play again on my old systems. Thing with those is the part that they suck. as in:
Pc
AMD 2000+
2gigs ram
Radeon 7800 (if I`m correct)

and my laptop:
duo 1.6gig
3gigs ram

I used to run my main on my laptop and 3 adds on my pc. Framerates suck hard since both systems can`t even get more then 25fps in single boxing. Putting 2 on my laptop with PiP took laptop performance down and my pc ran just as shit with 2 as it did with 3.

That`s why I`m thinking of totally killing off the fps on slaves if it doesn`t cost me cast times. I want to run DK with 4 shamans to do instances so I cannot have that lol.

I already run at lowest of the lowest details possible to keep things going and as far as I can see it isn`t the 2gigs of ram in my pc which is causing the problem but the CPU since ram isn`t even fully used.
I looked into overclocking as well but I don`t think that that will be a big solution.

I also run vista on both systems now (xp only lets you get sata drivers of a floppy while I have no drive for it) and my pc runs at 32bit. Would 64bit and windows xp make a big difference in my case?

Hopefully I make some sence :-)

Thanks in advance.

Pushing down the frame rate on slaves is the #1 thing you can do in my experience to improve system performance. I have a reasonably powerful system and I still need to do this.

There are two different console commands to set frame rate, /maxfps and /maxfpsbk. /maxfpsbk is the more important of these. It limits the frame rate for WoW windows that are in the background, which will be your slave windows most of the time. I recommend setting this to 5 or so. It does not impact how the UI processes your spells/commands.

Setting other visual effect setting very low on the slaves will help as well, although you may be ultimately limited by your system from running a full 5.

In relative order of importance based on my informal testing:

1. Screen size/resolution - small
2. Aliasing - as low as possible
3. View distance - turn it down

Then, other visual settings like spell detail, etc.

Also, another hint, if you aren't already doing it, kill all unnessesary programs prior to booting up Wow. That will help a bit aswell - and sometimes every bit helps :)