Method is pretty easy I just did the following :
1. Returned to stock phone partition i.e. Stock Gen2 (md5:85D7B01156C2E713FA927C78D2C39D53).
2. Flashed stock Dell XCD 35 Froyo F/W.
3. Placed the 2.3.5 image.bin file under SD Card > image .
4. Then went to settings > About phone > System updates.
Major changes I noticed over CM7 are :
Faster response as around 320mB RAM is free on CM7 max I could get was 280mB.
WiFi doesnt drop out
, Cant comment on battery life as of now .
Been using the phone for 2 hrs and am loving it , its much more stable
i miss a few CM7 settings though but overall i find it a lot better.
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Download ROM here :
Link.
And it can be rooted without any hassle