I don't see www.irfanview.com as being a program. However, IrfanView is a program. I guess Notetab is also a program, not a web site.

Instead of polluting your machine with a copy of Windows, you could try the Mac equivalents. Irfanview is roughly the same as Graphic Convertor and is available, as shareware, for the Mac (OS X and OS 9.x.x)
I'm not sure what you actually do with Notetab but there is probably an equivalent program out there for the Mac.

Who knows, someone here may point you in the right direction