Anyone having issues doing manual installs and can't find the information they need in the forum but are following an off-site guide:
1. If you get signature verification messages, make sure the following -- It's named update.zip not update.zip.zip. If in Astro you see a .zip at the end of it, delete the .zip and try again. Astro automatically assigns the file extension.
2. If you still can't get it to work, use Astro to move the file to the root of the SD card. The root is option /sdcard when you first open Astro.
3. Verify that your file is the right size. It should be approximatly 43MB for the small update or 76MB if you're using the large update. The large update is still the preferred one.
If you still can't get it to work, PM someone who has it working who did a manual install, or someone who seems knowledgeable and who speaks in a manner you can understand (no offense to anyone, I just know some people have a hard time understanding what I or someone else might say) and see if they can help you out.