Note that bootldr itself only supports CF. So, while you can install bootldr from Pocket PC using an MMC or SD card, you can only install Linux if you have a CF card.

• Copy the distribution files (all of them) to a CF card with a vfat filesystem (most cards come pre-formatted with vfat), or purchase a 32MB CF card with the distribution files from Crynwr Software.
• Insert the CF card into your CF slot.
• Run Start Menu->Programs->File Explorer.
• Click on the grey bar with the picture of the iPAQ on it. It probably says "My Documents".
• Select "My Device" from the drop-down menu.
• One of the entries on the screen should say "Storage Card". Click on it.
• You should see a listing of the distribution files.
• Double-click on BootBlaster.
• BootBlaster will start up and display "Idle...".
• Copy saved_bootldr.gz, wince_image.gz and assets.gz from "My Documents" to the Storage Card using File Manager.

When finished continue to the Install via Compact Flash sleeve step.