Have you noticed that ever since you installed Roland Cut Studio in Illustrator CS3, it's running slower?
You probably have a Mac, don't you? It's probably new, isn't it?
Do you remember the step where you had to setup Illustrator CS3 to run using Rosetta so that the Roland Cut Studio plug-in would work? That had major implications.
Roland Cut Studio for Mac predates Apple's switch to Intel chips. It's written and compiled for PowerPC (i.e. G4, G5). Adobe gave you a universal binary for Illustrator, which means you have both the PowerPC and Intel versions.
What does this mean?
You have to run Illustrator in PowerPC mode (i.e. using Rosetta) so that Cut Studio works. This means that every time Illustrator uses a CPU it needs to translate the PowerPC code to Intel code. For some programs this isn't a big deal. For programs like Photoshop and Illustrator, which can be computationally intesive, this is a very big deal. The difference is akin to speaking with someone in your native tongue versus speaking to a non-native speaker via a translator.
Is there a solution?
Not a good one. I recommend doing all of your design work in native mode (without Rosetta) and re-running Illustrator with Rosetta when you have a finished product that you want to plot.
To do this, go to your applications folder, open the Illustrator folder, and Ctrl-click on the Illustrator program. Click "Get info." You should see a check-box for "Open using Rosetta."
Hopefully Roland will get it's act together soon.