Which guide are you following Minx?
I followed several guides and none of them worked as they did not involve flashing a stock rom first.
I then found and followed this guide which means you flash a stock rom first then the vulnerability SBF and it worked without hitch.
I used the stock UK SHOLS_U2_02.31.0 rom to flash within RSD first, then flashed the vulnerability SBF, then applied the update.zip.
Im in Account and sync options, Auto-sync is on, will my contacts already be synced now?
I have tried that.
And when i try to run the update.zip, it tells me the file is missing
I have tried that.
And when i try to run the update.zip, it tells me the file is missing
That is what happens if you haven't flashed the vunerable recovery sbf.

Ive tried the way you posted, but the rsd lite doesn't show the SBF which you flash with first :/