Hi Pete, didn't want to take up too much space on G+
Here is some ZTE Blade goodies.
Check which Gen you have with "ask MR Pigfish", https://play.google.com/store/apps/details?id=com.apedroid.pigfish&hl=en-GB
I think you have already done this an have Gen 1, so you will have to install the Gen1 to Gen 2 conversion files, this is a little different to installing a custom rom as you download this http://forum.xda-developers.com/showthread.php?t=1258855
then extract the files to the root of you SD card rather than just copy them, this is great, really opens up the phone to loads more roms.
Then here are all the best roms for your Blade http://forum.xda-developers.com/showthread.php?t=1702636
Swedish Snow seems to be the fastest, very nice, I am currently using cyanogenmod 9 (ICS) with no problems, there are reports of later roms (Jellybean) being unstable.