any program like instagram for android?

I have have not rooted and flash any new ROM on my phone.
However I have read through Chainfire's CF-Root pages and of course page 1.
I am tempted now to root the phone after considering all the +ve benefits of rooting my phone.
But before I root, I have a few questions that I hope you guys can help answer.

1. After using Chainfire's method to root the phone, will my existing apps, configuration, contact, sms be removed/wiped-out? Was not able to find any answers to this.

2. Since ODIN is an exe that runs on Windows, is there a possibility of it carrying any virus/malware? How about the tar file?

3. Should I choose this "CF-Root-SGS2_XW_OJV_KF1-v4.0-CWM4.tar" file from PDA in ODIN to root my phone since my stock kernal is KF1?

4. Is it better/easier to use Chainfire's method (zImage) to remove the triangle or just buy a jig to do this? The triangle will only show during boot up right?

How's your market problems? Everything back to normal now ? :-)

Appreciate your answers!

1. I just found out from reading Chainfire's most recent and very long pages (100+ pages) that it does not wipe-out data on the phone.
2. Since I have never heard of any complaints about ODIN potentially carrying malware/virus, I can take a calculated risk to say it doesn't. Not 100% sure tho.
As for the tar file, it seems like Chainfire just added a few extra to the stock Kernal like CWM, etc before re-packaging/compressed it into a tar file.
3. Noted
4. The zImage is from the same tar file (CF-Root-SGS2_XW_OJV_KF1-v4.0-CWM4.tar)?
5. Any negative side effects so far after Rooting?

Again, many thanks!