When I had my 4.2.6 Jailbroken I regretted not saving it after I did the 5.0 update and realized how many things i missed. I'd like to be ready for when Apple updates 5.0.1 to somthing newer! I don't have a complete understanding of SHSH blobs and APtickets, and I read in multiple places that shsh doesn't work with 5.0 but not sure if that was old news, is that still the case? Will there be any way to go back to 5.0.1 if a full restore is needed? I read about Ifaith but didn't really understand if thats what its going to take to restore when apple isn't signing 5.0.1 anymore and I've never used TU but am willing to learn about it if I have to.

Is this ALL I have to do to make sure that I can restore my Iphone4 (cdma) to 5.0.1 and re-jailbreak if needed?

Use this guide to save 5.0.1 blobs and apticket first with Ifaith : Apple, iPhone and iPad News | ModMyi - [How To] Use iFaith to Save SHSH Blobs + APticket for iOS 5.0 + Build Custom Firmware

Use this guide to Restore to 5.0.1 after apple updates and is no longer signing 5.0.1: Apple, iPhone and iPad News | ModMyi - [How To] Use the Custom iFaith Firmware File to Restore Back to iOS 5.0

Is this correct? Do i still need to do something with Tiny umbrella?

I appoligize it this has already been asked but my search feature just sends me to a fatal error, might be because of the way things are set up here at work.
Thanks