Read this section of the faq:

http://androidforums.com/desire-all-things-root/221212-faq-rooting-updated-10th-august-2011-a.html#27

 

For the rom you are using the only reason to get S-Off would be to change the sizes of the internal partitions to run the Data++ version of the rom.

 

i'm using the same ROM, but data++ version.

when the next update comes along, you should be able to flash the A2SD+ version straight over the top without wiping anything. as always nandroid just in case.

if you want to convert to data++ version, there is a good FAQ linked on virtually every page of the xda thread. you can't flash it straight over the top.

you would need to S-OFF, change hboot CM7r2, and a full wipe before installing. backup and restore user apps using titanium.

it sounds a faff, but that FAQ is very very useful. a lot of people posting in the main thread need to read it!

 

its everything you need to know in written in a way that if you follow it step by step you will understand what you are doing and will be less likely to encounter problems
It is large as it covers nearly every eventuality but its good

basically if you want to know about s-off read the section about it in the guide and it will tell you.

you dont have to read and understand it all at once, only when you need to achieve something

 

Rasta, how are you finding RMD recovery in your sig? I am interested in this aswell.

 

yeh i thought it was a faff, i was put off a lot in the main thread, but that was down to a lot of ppl just not reading.

the FAQ is a godsend, overall for me it was worth S-OFFing and switching hboot. data++ has more space, and is faster with dalvik on nand.