Nokia Applications :: .sis And Exe Files Not Supported?

I have a Nokia 2330. It is a relatively cheap and simple phone, but it is very handy to me because it can receive network signals where oher expensive phones cannot. However, I cannot install .sis, and .exe files. I have seen a posted answer about an .exe fie. It was indicated that it must be converted to a .sisx file (if I am correct). install these files, or how to convert it for it to be compatible for use on my phone.