Database Users

[Q] Can we downgrade to older ROM ?

hi forumers & developer,
I have a good question to ask, currently my friend Legend is at latest firmware, as follow:
firmware 2.1update 1
baseband
47.39.35.09u_7.08.35.21
kernel
2.6.29-5f084974
htc [email protected] #1
build no
2.05.707.1 cl 191838
software
2.05.707.1
browser
webkit 3.1
This firmware is for Asia (Singapore) market.....
Here's my main question
Can i downgrade back to older firmware by flashing the older firmware ?
The link is here:
http://www.androidfiledepot.com/Sto..._Radio_47.26.35.04_7.05.35.26L_rel_120993.exe
My friend would like to root his Legend
Any kind reply will be gladly appreciated

Yes, please see this thread:
http://forum.xda-developers.com/showthread.php?p=8650787#post8650787

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bump