welcome to the club! 

faster read up on rooting and flashing and get your Desire to Froyo... 

Hi, may I ask if the HTC Desire come with a backup apps which can restore everything including data and apps (Important for flashing the firmware)?

Is tat a paid app? The cyanogen is giving me browser prob. Cant seem to load it properly. N i miss the "click to minimize my keyboard" icon on d keypad.

ok, as promised, some basic step by step guide to partition your sd card with Amon_RA.

Stage 1: Get Amon_RA into the Desire
1. Download Unrevoked.  [Link]
2. Download Amon_RA  [Link]
3. Install HTC and HBOOT driver.
4. Run reflash.exe as Administrator (DO NOT connect your Desire to computer at the moment).
5. At Unrevoked, File>>Custom Recovery>>Choose recovery-RA-desire-v1.7.0.1-R5 (the Amon_RA file you download in step 2).
6. Connect your Desire (USB debug mode on, etc).
7, The rest is fully automatic. 

Stage 2: Partition you SD Card
1. Enter into Recovery mode.  You will see the options below:
    - Reboot system Now
    - USB-MS toggle
    - Backup/restore
    - Flash
    - Wipe
    - Mount
    - Partition sdcard
    - Other
    - Power off
2. Under Partition sdcard, you will see:
      - Partition SD
      - Repair SD:ext
      - SD: ext2 to ext3
      - SD: ext3 to ext4
3. Use Partition SD to make the ext2, swap, and the remainder will be auto partitioned to be FAT32.
4. press back to return to step 2, select SD:ext2 to ext3 to upgrade the ext2 you created in step 3 into ext3.  Do SD:ext3 to ext4 if you want to upgrade further to ext4.  But I only upgrade to ext3 only coz i read somewhere ext4 is not necessary.
5. Reboot system now, it will boot with all the partitions now.

Note:  If you want to flash rom, you can use the Wipe function to wipe all ext3 partition, cache, etc clean, but the partition remain intact.

Hope this mini guide helps. For more details, should refer to this master guide.

1. IIRC, you need.
2. I partition first before flash.
3. Wipe the data but the partition remain. You can't make it to have bigger capacity IIRC.
x64 problems. I faced that before but once I used xp x86, it works perfectly.

1. yes, definitely if you want to change the size of the partition.
2. Should partition first then only flash rom, so that the rom will straight away recognise the ext3 partition.
3. The wipe only function is only useful when you want to flash rom but the partition size remain, eg. when you want to just upgrade the rom (the data on the card still intact if you did not delete the FAT32 partitions).  To change partition size denifitely need to repartitioning, all the partitions and data on the card WILL BE LOST.

@KTCY, you are the sifu lah, can't be wrong. 

did you do the Revoked with Amon_RA?  You are stuck just after the Unrevoked?

if you haven't install Amon_RA, what program you use to partition the card?  My mini guide is only applicable when you have installed Amon_RA with Unrevoked.

Boot from recovery ?

Put in a ROM zip into the SD card, boot into recovery and flash to that image. There are times when you flash your SD card and you will be caught in a boot loop.

Take out your SD and use a card reader.

I also think this is the easiest.  Delete all the partitions you created and format into 1 single partition.  Then copy the new ROM zip file into it.

1. yes, definitely if you want to change the size of the partition.
2. Should partition first then only flash rom, so that the rom will straight away recognise the ext3 partition.
3. The wipe only function is only useful when you want to flash rom but the partition size remain, eg. when you want to just upgrade the rom (the data on the card still intact if you did not delete the FAT32 partitions).  To change partition size denifitely need to repartitioning, all the partitions and data on the card WILL BE LOST.

@KTCY, you are the sifu lah, can't be wrong. 

I was previously on NexTSense5.3 and had partition SD card ext3 to 512MB. Now I managed to flashed to AuraxTSense7.1 finally (I was stuck at the HTC boot up screen after formated my SD card). However, now when I look at the disk space under computer management using my laptop, i found out that my SD card space available is around 14GB++ on my 16GB SD card (FAT32), is this normal? Does it mean that I have fully deleted all partition I made before on NextSense5.3 and I am now safe to continue partition using amon_ra as per the guide Cynox provided? (I want to change my partition on ext3 to 1GB from the previous 512MB) 

Pls advice.

A screenshot on my laptop computer management, note that the "Mark Partition as Active" and "Delete Partition" is grey out (Meaning the SD card is now clean without partition?), I am on windows XP by the way.

Just boot into your recovery manager and do a nandroid restore

Should be very straightforward

I was previously on NexTSense5.3 and had partition SD card ext3 to 512MB. Now I managed to flashed to AuraxTSense7.1 finally (I was stuck at the HTC boot up screen after formated my SD card). However, now when I look at the disk space under computer management using my laptop, i found out that my SD card space available is around 14GB++ on my 16GB SD card (FAT32), is this normal? Does it mean that I have fully deleted all partition I made before on NextSense5.3 and I am now safe to continue partition using amon_ra as per the guide u provided? (I want to change my partition on ext3 to 1GB from the previous 512MB) 

Pls advice.

A screenshot on my laptop computer management, note that the "Mark Partition as Active" and "Delete Partition" is grey out (Meaning the SD card is now clean without partition?), I am on windows XP by the way.