puttersman, it sounds like a "simple" case of over-worked CPU. You mention low RAM and that does not help the processing either. I notice that if I play 3-4 games in a row without restarting the browser, it starts to slow down. Everything goes in slow motion (ball moves as a slideshow on the green), the meter seems to hesitate (but not really jumping, just small disturbances) and it happens that I click and I see the meter continue for some milliseconds before it stops.
To minimize the effect:
1. Close all browser windows except the client itself (Important to also the WGT homepage since it also runs Flash stuff that competes about the CPU and the memory)
2. Close all other programs that is not necessary (Word can consume a lot of RAM)
3. Restart the browser in between each round
If she is familiar with the system monitor she can look at that one and sort by memory to see what programs to close. There she also can see what stuff if using the CPU most.
Fine tuning Flash itself will probably not do much and I think the best options might actually be to leave it to it's default values. It can not get the attention it needs anyway, so no use asking for more.