HTC Desire :: Can't Install ROM's

So with difficulty I eventually managed to root my HTC Desire on 02 (Ireland) - it runs 2.1 but I want to try a new rom, specifically Froyo Sense from LeeDr0id: [FroYo Sense] LeeDrOiD V2.0 (30/08 l Official 2.2 l FAST l STABLE l OPTIONAL A2SD+) - xda-developers

I downloaded ROM Manager and bought the premium version. I backed up my contacts with HTC Sync, and I have made a backup of my current setup to the SD Card. I then tried installing a new ROM with ROM manager, but it just does not work. It just restarts the phone. Sometimes it would go into a boot loop. I tried two differnt ROM's (Mocado and Pays rom) and I would get the customised ROM welcome screen but it would just loop at that screen. I would have to pull the battery and wipe, then restore to my primary backup.

I did manage to get one rom installed, and that was when I downloaded Pinky from within ROM Manger and it installed. But I did not like Pinky - none of the others within the downloader look any good really.

I even tried booting into recovery mode, restoring to factory settings, then boot to recovery, install from SD and try install the rom there. It seems to take about 10 seconds to install/extract, tells me to restart, looks like its extracting, but then I just get my normal 2.1