Deleting images on ipad

Question

I am not sure I understand how ipad treats images based on where they have come from i.e. taken by ipad or copied from a PC/MBP, downloaded from the net directly onto the ipad. There are a few 100 images on my ipad now and I am trying to organize them into albums. I tried to follow the steps/guidelines provided in the ipad manual, but not one step written there matches with what I see on the ipad.
1. Some albums are deletable, some are not: When I select the 'Albums' tab and then click 'Edit', some albums show an 'x' in a black circle at their top left corner, some do not. Is the 'x' to be clicked to delete an album? If yes, how do I delete the other albums which do not have an 'x' on them. If not, what is the process to delete an album. (Note: As per ipad manual, to delete an album, Tap edit and then Tap a '-' in a red circle, however I do not see the red circle on clicking edit)
2. Same question as above, but now at an image level. Some images are deletable, some are not: From the 'Photos' view (or even while viewing photos from inside an album), some images have the trash can at the top right, whereas some do not. How do I delete images that do not have the trash can.
Beyond the above items, I have a larger question on the usage of the term 'Syncing'. How do I transfer/copy images from my MBP to the ipad (i mean transfer, and not sync). And after transfering them, I usually edit/reorganize images in the ipad. Next time when I connect my MBP to the ipad, I want to be able to choose what I transfer from the MBP to the ipad (or vice versa). I dont want iTunes to automatically sync the two devices to their earleir state, and hence undo all the changes I made in the images in my ipad. Is this possible? How do I do it.

Answer 1

The links below have instructions for deleting photos.
iOS and iPod: Syncing photos using iTunes
http://support.apple.com/kb/HT4236
iPad Tip: How to Delete Photos from Your iPad in the Photos App
http://ipadacademy.com/2011/08/ipad-tip-how-to-delete-photos-from-your-ipad-in-t he-photos-app
Another Way to Quickly Delete Photos from Your iPad (Mac Only)
http://ipadacademy.com/2011/09/another-way-to-quickly-delete-photos-from-your-ip ad-mac-only
How to Delete Photos from iPad
http://www.wondershare.com/apple-idevice/how-to-delete-photos-from-ipad.html
How to: Batch Delete Photos on the iPad
http://www.lifeisaprayer.com/blog/2010/how-batch-delete-photos-ipad
(With iOS 5.1, use 2 fingers)
How to Delete Photos from iCloud’s Photo Stream
http://www.cultofmac.com/124235/how-to-delete-photos-from-iclouds-photo-stream/
These links may be helpful.
How To Create Photo Albums http://tinyurl.com/cxm4eoq
How to Add New Albums in the Photos App on the iPad & Add Photos to the Album
http://tinyurl.com/7qep7fs
Another way to import. You can use a USB flash drive & the camera connection kit.
Plug the USB flash drive into your computer & create a new folder titled DCIM. Then put your movie/photo files into the folder. The files must have a filename with exactly 8 characters long (no spaces) plus the file extension (i.e., my-movie.mov; DSCN0164.jpg).
Now plug the flash drive into the iPad using the camera connection kit. Open the Photos app, the movie/photo files should appear & you can import. (You can not export using the camera connection kit.)
Secrets of the iPad Camera Connection Kit
http://howto.cnet.com/8301-11310_39-57401068-285/secrets-of-the-ipad-camera-conn ection-kit/
 Cheers, Tom