how to downgrade offical rom

[batkoo]

i have HTC touch diamond and i download the rom from (HTC support) and i want to make this offical rom to downgrade again how i could do that

[TaurusBullba]

i have HTC touch diamond and i download the rom from (HTC support) and i want to make this offical rom to downgrade again how i could do that

If I understand you correctly, you'd like to use the OEM ROM for your Diamond? If so, it's easy to "downgrade", just flash the phone with the file you downloaded from HTC's website. If that is not what you meant, let me know.

[batkoo]

i want to try orginal windows and my htc now flashed if i used orginal one can i get back my 6.5 cause i don,t know how to flashing it

[TaurusBullba]

i want to try orginal windows and my htc now flashed if i used orginal one can i get back my 6.5 cause i don,t know how to flashing it

If you want to get back to 6.5 you'll need to do a bit of reading to learn how to flash a ROM. The information can be found in the sticky here (http://forum.xda-developers.com/showthread.php?t=416211) (is at the top of this forum).