you got a good step by step for flashing cwm3?
managed to get the drivers etc install so just need to go about flashing, havnt used the sdk before so need some pointers.
not sure I can remember, roughly....
-downloaded android SDK and installed
-installed all SDK updates available (not sure which you need)
-download 3.0.0.5 and rename to recovery.img
-dump that file in SDK tools folder
-boot phone into bootloader and select usb (your phone should appear in device manager, drivers should be in android sdk folder if you need them)
-goto command prompt in windows and goto tools folder... this is what I did in there....
C:\Program Files (x86)\Android\android-sdk-windows\tools>fastboot flash recovery recovery.img
< waiting for device >
sending 'recovery' (3974 KB)... OKAY [ 0.661s]
writing 'recovery'... OKAY [ 0.696s]
finished. total time: 1.357s
C:\Program Files (x86)\Android\android-sdk-windows\tools>
Now that I'm on this version I'll goto nightly builds in a week or so once they've ironed out few bugs etc...