is it possible to root and still have the latest radio/sd card fix?

[xunknownx]

Hello,

this is my first time rooting as im coming from winmo. when i first got the phone, i did the OTA update and got the latest radio and the SD card fix. now i am following the downgrade instructions to try and downgrade my phone and then root the phone. but that will mean that i wont have the latest radio and will experience problems with my SD card?? and will i be able to get future OTA updates? sorry im a noob to android.