No free way, unless you know of someone who can do it for you for free.
Wotan and Davinci has been the one that I use. I don't really update the firmware through SEUS. But wontanserver.com is what I mostly use. And yes, you can get rid of the the Rogers icons by flashing to the latest generic version. Just Google in those key words, and you can go from there. If you are not comfortable in any way with doing this on your own, I'd suggest you find someone or a business that can do it for you at a reasonable price. Check out the classifieds, craigslist, online, or anywhere else that would offer these services. One reputable online business is iUnlock...very curteous and professional. Just remember, when you flash it to the original manufacturers settings, it voids the warranty replacement through Rogers.
In any case, the K790a is a great phone. I might be getting the Bond silver edtition. Have fun with your new phone.