Software Installation - PC vs Device

[regression]

Hello, I hope this is the right section to post my question. My question isn't about a specific piece of software, but a general one on how software is installed.

Most software for the PPC comes as a cab you run from your device. Some software is an exe that you run from your Windows PC with your device attached. I can understand software like PdaNet that you must install from your PC, as there is a PC and device component.

However, some software, like SPB Screen Shot, doesn't have a PC component, however when I downloaded the software, all I could find is an exe to run from Windows.

Technically, is there an advantage to installing via a Windows PC? I'm not picking on SPB Screen Shot, but to me, it would seem much simpler to just give people a cab. I like to keep my PC as "clean" as possible, but I have a few programs on there I never use. They get put in the start menu and add / remove programs list when I install PPC software from my desktop.

Thanks.