Rooted with issues

[iramos912]

Hi guys new to technology and actually need to tell you guys that I rooted my phone unknowingly the first time. I thought all I was doing was installing Froyo because I just wanted my phone to work with adobe flash 10.1 However I realized the file I downloaded and installed called Android Froyo M900.zip was infact to root my device. I initially had some problems flashing the phone after I realized thats what I had done but those are resolved and the root seems to be working ok except for a couple of minor irriations.

So my questions are:

1. I am still not able to run adobe flash even though my phone now says is running 2.2--not a big deal I guess but why isnt it working?

2. When I rooted it took away my telenav which I always use and my Sprint TV which I want to use especially if I can't run adobe flash on my phone? I have tried to download them off 4share.com and they install but wont work?

3. Do I need a custom rom? (I dont know what this is?) Where can I download and how do I install such a thing?

Please any help on any of the 3 issues is greatly appreciated. I am new to this but I learn fast please explain whatever you can, thanks in advance.